Deep Look

Deep Look
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DEEP LOOK is a science video series that explores big science by going very, very small, from KQED and PBS Digital Studios.

We use macro photography and microscopy in glorious 4K resolution, to see science up close... really, really close.

* NEW VIDEOS EVERY OTHER TUESDAY! *

SUBSCRIBE: http://goo.gl/8NwXqt

On Twitter:

Lauren Sommer: Host/Writer @lesommer
Joshua Cassidy: Lead Producer / Cinematographer @Jkcassidy
Teodros Hailye: Animator
Elliott Kennerson: Producer / Editor @elliott_KQED
Gabriela Quiros: Coordinating Producer
Craig Rosa: Series Producer @craigrosa
Seth G. Samuel: Composer @sethgsamuel
Kia Simon: Editor and Motion Graphics: @KiaSimon

Like hummingbirds? Slugs? Owls? Squid? Mosquitoes? See the unseen and discover wildlife, biology, chemistry, and nature videos.

--
KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.

Praying Mantis Love is Waaay Weirder Than You Think | Deep Look

These pocket-sized predators are formidable hunters. But when it comes to hooking up, male mantises have good reason to fear commitment. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Mike Maxwell recently finished a ninth season studying the love life of the praying mantises that live around Bishop, a town in California’s Eastern Sierra. Over that time, he’s seen some unsettlingly strange behaviors. It’s pretty common knowledge that female mantises sometimes eat males during or after mating — a habit that biologists call “sexual cannibalism.” But among the bordered mantises that Maxwell researches, it gets weirder than that. As it turns out, when a male mantis loses his head, it doesn’t mean he loses the urge to procreate. You read that right. Not only can some male bordered mantises continue mating even while being attacked by their female counterparts, some males are able to mount a female and initiate mating even after getting their heads completely bitten off. “It’s a really weird, strange behavior,” said Maxwell, “So what’s going on? Why do they do it?” -- What do praying mantises eat? Praying mantises are mostly ambush predators that typically eat small animals like grasshoppers, crickets, bees, crickets and butterflies . They use camouflage to hide themselves and wait for their prey to come within striking distance. Then they use their raptorial forelimbs to grab their prey. Spikes on their forelimbs help them hold their prey while they eat. -- Why do praying mantises eat each other? Female praying mantises sometimes eat males that approach them to mate. They are only able to do this because mantises are predators and the female mantises are bigger and stronger than the males. -- Do praying mantises bite? Most mantises will not bite people but they will pinch people with their forelimbs to defend themselves. It feels a lot like getting bit, trust me. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/11/14/praying-mantis-love-is-waaay-weirder-than-you-think-deep-look/ ---+ For more information: Dr. Michael Maxwell, National University https://www.nu.edu/OurPrograms/CollegeOfLettersAndSciences/MathematicsAndNaturalSciences/Faculty/MichelRMaxwell.html ---+ More Great Deep Look episodes: It’s a Goopy Mess When Pines and Beetles Duke it Out | Deep Look https://www.youtube.com/watch?v=wR5O48zsbnc These Whispering, Walking Bats Are Onto Something | Deep Look https://www.youtube.com/watch?v=l2py029bwhA&t=3s There's Something Very Fishy About These Trees ... | Deep Look https://www.youtube.com/watch?v=rZWiWh5acbE&t=1s ---+ See some great videos and documentaries from PBS Digital Studios! How Your Rubber Ducky Explains Colonialism | Origin of Everything https://www.youtube.com/watch?v=BWjzOcIIxgM When Whales Walked | PBS Eons https://www.youtube.com/watch?v=_OSRKtT_9vw The Cheerios Effect | It’s OK To Be Smart https://www.youtube.com/watch?v=mbKAwk-OG_w ---+ Follow KQED Science KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

1 miesiąc temu

It’s a Goopy Mess When Pines and Beetles Duke it Out | Deep Look

An onslaught of tiny western pine beetles can bring down a mighty ponderosa pine. But the forest fights back by waging a sticky attack of its own. Who will win the battle in the bark? SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Bark beetles are specialized, with each species attacking only one or a few species of trees. Ponderosa pines are attacked by dark brown beetles the size of a grain of rice called western pine beetles (Dendroctonus brevicomis). In the spring and summer, female western pine beetles fly around ponderosa pine stands looking for trees to lay their eggs in. As they start boring into a ponderosa, the tree oozes a sticky, viscous clear liquid called resin. If the tree is healthy, it can produce so much resin that the beetle gets exhausted and trapped as the resin hardens, which can kill it. “The western pine beetle is an aggressive beetle that in order to successfully reproduce has to kill the tree,” said U.S. Forest Service ecologist Sharon Hood, based in Montana. “So the tree has very evolved responses. With pines, they have a whole resin duct system. You can imagine these vertical and horizontal pipes.” But during California’s five-year drought, which ended earlier this year, ponderosa pines weren’t getting much water and couldn’t make enough resin to put up a strong defense. Beetles bored through the bark of millions of trees and sent out an aggregating pheromone to call more beetles and stage a mass attack. An estimated 102 million trees – most of them ponderosa – died in California between 2010 and 2016. -- What is resin? Resin – sometimes also called pitch – is a different substance from sap, though trees produce both. Resin is a sticky, viscous liquid that trees exude to heal over wounds and flush out bark beetles, said Sharon Hood, of the Forest Service. Sap, on the other hand, is the continuous water column that the leaves pull up to the top of the tree from its roots. --- Are dead trees a fire hazard? Standing dead trees that have lost their needles don’t increase fire risk, said forest health scientist Jodi Axelson, a University of California extension specialist based at UC Berkeley. But “once they fall to the ground you end up with these very heavy fuel loads,” she said, “and that undoubtedly is going to make fire behavior more intense.” And dead – or living – trees can fall on electric lines and ignite a fire, which is why agencies in California are prioritizing the removal of dead trees near power lines, said Axelson. ---+ Read the entire article about who’s winning the battle between ponderosa pines and western pine beetles in California, on KQED Science: https://ww2.kqed.org/science/2017/10/24/with-california-drought-over-fewer-sierra-pines-dying/ ---+ For more information: Check out the USDA’s “Bark Beetles in California Conifers – Are Your Trees Susceptible?” https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5384837.pdf ---+ More Great Deep Look episodes: This Mushroom Starts Killing You Before You Even Realize It https://www.youtube.com/watch?v=bl9aCH2QaQY&t=57s The Bombardier Beetle And Its Crazy Chemical Cannon https://www.youtube.com/watch?v=BWwgLS5tK80 There’s Something Very Fishy About These Trees … https://www.youtube.com/watch?v=rZWiWh5acbE ---+ See some great videos and documentaries from PBS Digital Studios! Vascular Plants = Winning! - Crash Course Biology #37 https://www.youtube.com/watch?v=h9oDTMXM7M8&index=37&list=PL3EED4C1D684D3ADF Julia Child Remixed | Keep On Cooking https://www.youtube.com/watch?v=80ZrUI7RNfI ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

1 miesiąc temu

These Whispering, Walking Bats Are Onto Something | Deep Look

Bats have a brilliant way to find prey in the dark: echolocation. But to many of the moths they eat, that natural sonar is as loud as a jet engine. So some bats have hit on a sneakier, scrappier way to hunt. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Bats have been the only flying mammals for about 50 million years. Most species, with the exception of the fruit bats, use echolocation -- their built-in sonar -- to detect prey and snatch it from the air. But not pallid bats. They hunt insects and arachnids that live on the ground by tracking their movements with another sense: hearing. In the final moments of their attack, they land and pluck their prey from the ground, a behavior called gleaning. It took millions of years for bats to develop the lethal pairing of flight and echolocation. Why would a bat “go back” to a more primitive hunting style? Many scientists believe the answer may have less to do with the bats alone than with moths, their principal food. In what these scientists describe as an “arms race” of evolution, many moth species have adapted to hear when they’re being tracked and to deploy counter-measures to bat echolocation. These developments have driven some bats to seek alternate means of catching a meal – in part by keeping their sonar volume down. Pallid bats and other so-called “whispering bats” still use their echolocation to navigate. The volume navigational sonar is much quieter, more like a dishwasher. For the pallid bat, part of occupying that niche has also meant evolving immunity scorpion venom. Another arms race. --- Do all bats drink blood? No, only three bat species are exclusive “hemovores” (blood-eaters), and only one of those, the common vampire bat, prefers mammals. --- Why can’t humans hear echolocation? Bat echolocation calls, whether for hunting or navigation – are too high-pitched for our ears to hear. --- Do all bats carry rabies? Only ½ to one percent of bats carry rabies. If a bat seems sick, rabies could be the cause. You should never touch any bat that you find. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/10/10/these-whispering-walking-bats-are-onto-something ---+ For more information: Visit the Razak Lab at UC Riverside: http://www.faculty.ucr.edu/~khaleel/ ---+ More Great Deep Look episodes: A Real Alien Invasion Is Coming to a Palm Tree Near You https://www.youtube.com/watch?v=S6a3Q5DzeBM How Mosquitoes Use Six Needles to Suck Your Blood https://www.youtube.com/watch?v=rD8SmacBUcU ---+ See some great videos and documentaries from the PBS Digital Studios! Origin Of Everything: The True Origin of Killer Clowns https://www.youtube.com/watch?v=T5_Li2whOHA Physics Girl: Fire in Freefall https://www.youtube.com/watch?v=VAA_dNq_-8c ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

2 miesiące temu

There's Something Very Fishy About These Trees ... | Deep Look

Salmon make a perilous voyage upstream past hungry eagles and bears to mate in forest creeks. When the salmon die, a new journey begins – with maggots. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * For salmon lovers in California, October is “the peak of the return” when hundreds of thousands of Chinook salmon leave the open ocean and swim back to their ancestral streams to spawn and die. All along the Pacific coast, starting in the early summer and stretching as late as December, salmon wait offshore for the right timing to complete their journey inland. In Alaska, the season starts in late June, when salmon head to streams in lush coastal forests. Although this annual migration is welcomed by fishermen who catch the salmon offshore, scientists are finding a much broader and holistic function of the spawning salmon: feeding the forest. Millions of salmon make this migratory journey -- called running -- every year, and their silvery bodies all but obscure the rivers they pass through. This throng of salmon flesh coming into Alaska’s forests is a mass movement of nutrients from the salt waters of the ocean to the forest floor. Decomposing salmon on the sides of streams not only fertilize the soil beneath them, they also provide the base of a complex food web that depends upon them. --- Why Do Salmon Swim Upstream? Salmon run up freshwater streams and rivers to mate. A female salmon will dig a depression in the gravel with her tails and then deposit her eggs in the hole. Male salmon swim alongside the female and release a cloud of sperm at the same. The eggs are fertilized in the running water as the female buries them under a layer of gravel. When the eggs hatch, they spend the first part of their lives hunting and growing in their home stream before heading out to sea to spend their adulthood. --- Why Do Salmon Die After Mating? Salmon typically mate once and then die, though some may return to the sea and come back to mate the subsequent year. Salmon put all of their energy into mating instead of maintaining the salmon’s body for the future. This is a type of mating strategy where adults die after a single mating episode is called semelparity. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/09/26/theres-something-fishy-about-these-trees-deep-look/ ---+ For more information: Bob Armstrong’s Nature Alaska http://www.naturebob.com/ ---+ More Great Deep Look episodes: These Fish Are All About Sex on the Beach | Deep Look https://www.youtube.com/watch?v=j5F3z1iP0Ic&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp&index=3 Decorator Crabs Make High Fashion at Low Tide | Deep Look https://www.youtube.com/watch?v=OwQcv7TyX04 Daddy Longlegs Risk Life ... and Especially Limb ... to Survive | Deep Look https://www.youtube.com/watch?v=tjDmH8zhp6o ---+ See some great videos and documentaries from the PBS Digital Studios! Beavers: The Smartest Thing in Fur Pants | It’s Okay To Be Smart https://www.youtube.com/watch?v=Zm6X77ShHa8 How Do Glaciers Move? | It’s Okay To Be Smart https://www.youtube.com/watch?v=RnlPrdMoQ1Y&t=165s The Smell of Durian Explained | Reactions (ft. BrainCraft, Joe Hanson, Physics Girl & PBS Space Time) https://www.youtube.com/watch?v=a0v0n6tKPLc How Do Glaciers Move? | It’s Okay To Be Smart https://www.youtube.com/watch?v=RnlPrdMoQ1Y Your Biological Clock at Work | BrainCraft https://www.youtube.com/watch?v=8Q8djfQlYwQ ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio station in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration — exposing them to new people, places and ideas. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the David B. Gold Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

2 miesiące temu

A Baby Dragonfly's Mouth Will Give You Nightmares | Deep Look

Dragonflies might rule the skies, but their babies grow up underwater in a larva-eat-larva world. Luckily for them, they have a killer lip that snatches prey, Alien-style, at lightning speed. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * If adult dragonflies are known to be precise hunters, capable of turning on a dime and using their almost-360-degree vision to nab mosquitoes and flies in midair, their dragon-looking babies are even more fearsome. Dragonflies and damselflies lay their eggs in water. After they hatch, their larvae, also known as nymphs, spend months or years underwater growing wings on their backs. Without those versatile four wings that adults use to chase down prey, nymphs rely on a mouthpart they shoot out. It’s like a long, hinged arm that they keep folded under their head and it’s eerily similar to the snapping tongue-like protuberance the alien shoots out at Ripley in the sci-fi movie Aliens. A nymph’s eyesight is almost as precise as an adult dragonfly’s and when they spot something they want to eat, they extrude this mouthpart, called a labium, to engulf, grab, or impale their next meal and draw it back to their mouth. Only dragonfly and damselfly nymphs have this special mouthpart. “It’s like a built-in spear gun,” said Kathy Biggs, the author of guides to the dragonflies of California and the greater Southwest. With their labium, nymphs can catch mosquito larvae, worms and even small fish and tadpoles. “It’s obviously an adaptation to be a predator underwater, where it’s not easy to trap things,” said Dennis Paulson, a dragonfly biologist retired from the University of Puget Sound. Also known among biologists as a “killer lip,” the labium comes in two versions. There’s the spork-shaped labium that scoops up prey, and a flat one with a pair of pincers on the end that can grab or impale aquatic insects. -- How many years have dragonflies been around? Dragonflies have been around for 320 million years, said Ed Jarzembowski, who studies fossil dragonflies at the Nanjing Institute of Geology and Paleontology. That means they were here before the dinosaurs. -- How big did dragonflies used to be? Prehistoric dragonflies had a wingspan of 0.7 meters (almost 28 inches). That’s the wingspan of a small hawk today. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/09/12/a-baby-dragonflys-mouth-will-give-you-nightmares/ ---+ For more information: This web site, run by Kathy and David Biggs, has photos and descriptions of California dragonflies and damselflies and information on building a pond to attract the insects to your backyard: http://bigsnest.members.sonic.net/Pond/dragons/ The book "A Dazzle of Dragonflies," by Forrest Mitchell and James Lasswell, has good information on dragonfly nymphs. ---+ More great Deep Look episodes: Why Is The Very Hungry Caterpillar So Dang Hungry? https://www.youtube.com/watch?v=el_lPd2oFV4 This Mushroom Starts Killing You Before You Even Realize It https://www.youtube.com/watch?v=bl9aCH2QaQY&t=57s Daddy Longlegs Risk Life ... and Especially Limb ... to Survive https://www.youtube.com/watch?v=tjDmH8zhp6o This Is Why Water Striders Make Terrible Lifeguards https://www.youtube.com/watch?v=E2unnSK7WTE ---+ See some great videos and documentaries from PBS Digital Studios! PBS Eons: The Biggest Thing That Ever Flew https://www.youtube.com/watch?v=scAp-fncp64 PBS Infinite Series: A Breakthrough in Higher Dimensional Spheres https://www.youtube.com/watch?v=ciM6wigZK0w ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio stations in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration – exposing them to new people, places and ideas. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is supported by HopeLab, The David B. Gold Foundation; S. D. Bechtel, Jr. Foundation; The Dirk and Charlene Kabcenell Foundation; The Vadasz Family Foundation; Smart Family Foundation and the members of KQED.

3 miesiące temu

Daddy Longlegs Risk Life ... and Especially Limb ... to Survive | Deep Look

When predators attack, daddy longlegs deliberately release their limbs to escape. They can drop up to three and still get by just fine. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. We all know it’s not nice to pull the legs off of bugs. Daddy longlegs don’t wait for that to happen. These arachnids, related to spiders, drop them deliberately. A gentle pinch is enough to trigger an internal system that discharges the leg. Whether it hurts is up for debate, but most scientists think not, given the automatic nature of the defense mechanism. It’s called autotomy, the voluntary release of a body part. Two of their appendages have evolved into feelers, which leaves the other six legs for locomotion. Daddy longlegs share this trait with insects, and have what scientists call the “alternate tripod gate,” where three legs touch the ground at any given point. That elegant stride is initially hard-hit by the loss of a leg. In the daddy longlegs’ case, the lost leg doesn’t grow back. But they persevere: A daddy longlegs that is one, two, or even three legs short can recover a surprising degree of mobility by learning to walk differently. And given time, the daddy longlegs can regain much of its initial mobility on fewer legs. Once these adaptations are better understood, they may have applications in the fields of robotics and prosthetic design. --- Are daddy longlegs a type of spider? No, though they are arachnids, as spiders are. Daddy longlegs are more closely related to scorpions. --- How can I tell a daddy longlegs from a spider? Daddy longlegs have one body segment (like a pea), while spiders have two (like a peanut). Also, you won’t find a daddy longlegs in a web, since they don’t make silk. --- Can a daddy longlegs bite can kill you? Daddy longlegs are not venomous. And despite what you’ve heard about their mouths being too small, they could bite you, but they prefer fruit. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/08/22/daddy-longlegs-risk-life-and-especially-limb-to-survive/ ---+ For more information: Visit the Elias Lab at UC Berkeley: https://nature.berkeley.edu/eliaslab/ ---+ More Great Deep Look episodes: Stinging Scorpion vs. Pain-Defying Mouse | Deep Look https://www.youtube.com/watch?v=w-K_YtWqMro For These Tiny Spiders, It's Sing or Get Served | Deep Look https://www.youtube.com/watch?v=y7qMqAgCqME ---+ See some great videos and documentaries from the PBS Digital Studios! Gross Science: What Happens When You Get Rabies? https://www.youtube.com/watch?v=eiUUpF1UPJc Physics Girl: Mantis Shrimp Punch at 40,000 fps! - Cavitation Physics https://www.youtube.com/watch?v=m78_sOEadC8 ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio station in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration — exposing them to new people, places and ideas. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is supported by HopeLab, The David B. Gold Foundation; S. D. Bechtel, Jr. Foundation; The Dirk and Charlene Kabcenell Foundation; The Vadasz Family Foundation; Smart Family Foundation and the members of KQED.

3 miesiące temu

This Is Why Water Striders Make Terrible Lifeguards | Deep Look

They may look serene as they glide across the surface of a stream, but don't be fooled by water striders. They're actually searching for prey for whom a babbling brook quickly becomes an inescapable death trap. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * With the drought officially over and the summer heat upon us, people all across California are heading outdoors. For many, that means a day on the river or relaxing by the lake. The wet winter means there’s plenty of habitat for one of nature’s most curious creatures. Water striders, also called pond skaters, seem to defy gravity. You’ve probably seen them flitting across the water’s surface, dodging ripples as they patrol streams and quiet backwater eddies. Scientists like David Hu at Georgia Institute of Technology study how water striders move and how they make their living as predators lurking on the water’s surface. It’s an amazing combination of biology and physics best understood by looking up close. Very close. --- What are water striders? The common water strider (Gerris lacustris) is an insect typically found in slowly moving freshwater streams and ponds. They are able to move on the water's surface without sinking. They are easy to spot because they create circular waves on the surface of the water. --- How do water striders walk on water? Water tends to stick to itself (cohesion), especially at the surface where it meets the air (surface tension). Water striders don’t weigh very much and they spread their weight out with their long legs. Striders are also covered in microscopic hairs called micro-setae that repel water. Instead of sinking into the water, their legs push down and create dimples. --- What do water striders eat? Water striders are predators and scavengers. They use their ability to walk on water to their advantage, primarily eating other insects that fall into the water at get trapped by the surface tension. A water strider uses its tube-shaped proboscis to penetrate their prey’s exoskeleton, inject digestive enzymes and suck out the prey’s pre-digested innards. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/08/01/this-is-why-water-striders-make-terrible-lifeguards/ ---+ For more information: http://www.nature.com/nature/journal/v424/n6949/abs/nature01793.html?foxtrotcallback=true ---+ More Great Deep Look episodes: These Fish Are All About Sex on the Beach | Deep Look https://www.youtube.com/watch?v=j5F3z1iP0Ic&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp&index=3 How Do Pelicans Survive Their Death-Defying Dives? | Deep Look https://www.youtube.com/watch?v=BfEboMmwAMw Decorator Crabs Make High Fashion at Low Tide | Deep Look https://www.youtube.com/watch?v=OwQcv7TyX04 Why Is The Very Hungry Caterpillar So Dang Hungry? | Deep Look https://www.youtube.com/watch?v=el_lPd2oFV4&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp ---+ See some great videos and documentaries from the PBS Digital Studios! Beavers: The Smartest Thing in Fur Pants | It’s Okay To Be Smart https://www.youtube.com/watch?v=Zm6X77ShHa8 Can Genetically Engineered Mosquitoes Help Fight Disease? | Above The Noise https://www.youtube.com/watch?v=CB_h7aheAEM How Do Glaciers Move? | It’s Okay To Be Smart https://www.youtube.com/watch?v=RnlPrdMoQ1Y Your Biological Clock at Work | BrainCraft https://www.youtube.com/watch?v=8Q8djfQlYwQ ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio station in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration — exposing them to new people, places and ideas. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the David B. Gold Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

4 miesiące temu

Why Is The Very Hungry Caterpillar So Dang Hungry? | Deep Look

Because it's hoarding protein. Not just for itself, but for the butterfly it will become and every egg that butterfly will lay. And it's about to lose its mouth... as it wriggles out of its skin during metamorphosis. DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * That caterpillar in your backyard is chewing through your best leaves for a good reason. “Caterpillars have to store up incredible reserves of proteins,” said Carol Boggs, an ecologist at the University of South Carolina. “Nectar doesn’t have much protein. Most of the protein that goes to making eggs has to come from larval feeding.” Caterpillars are the larval stage of a butterfly. Their complete transformation to pupa and then to butterfly is a strategy called holometaboly. Humans are in the minority among animals in that we don’t go through these very distinct, almost separate, lives. We start out as a smaller version of ourselves and grow bigger. But from an evolutionary point of view, the way butterflies transform make sense. “You have a larva that is an eating machine,” said Boggs. “It’s very well-suited to that. Then you’re turning it into a reproduction machine, the butterfly.” Once it becomes a butterfly it will lose its mouth, grow a straw in its place and go on a liquid diet of sugary nectar and rotten fruit juices. Its main job will be to mate and lay eggs. Those eggs started to develop while it was a pupa, using protein that the caterpillar stored by gorging on leaves. We think of leaves as carbohydrates, but the nitrogen they contain makes them more than one quarter protein, said Boggs. -- What are the stages of a butterfly? Insects such as butterflies undergo a complete transformation, referred to by scientists as holometaboly. A holometabolous insect has a morphology in the juvenile state which is different from that in the adult and which undergoes a period of reorganization between the two, said Boggs. The four life stages are egg, larva (caterpillar), pupa (also known as chrysalis) and butterfly. -- What if humans developed like butterflies? “We’d go into a quiescent period when we developed different kind of eating organs and sensory organs,” said Boggs. “It would be as if we went into a pupa and developed straws as mouths and developed more elaborate morphology for smelling and developed wings. It brings up science fiction images.” ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/07/11/why-is-the-very-hungry-caterpillar-so-dang-hungry/ ---+ For more information: Monarch Watch: http://www.monarchwatch.org California Pipevine Swallowtail Project: https://www.facebook.com/CaliforniaPipevineSwallowtail/ A forum organized by Tim Wong, who cares for the butterflies in the California Academy of Sciences’ rainforest exhibit. Wong’s page has beautiful photos and videos of California pipevine swallowtail butterflies at every stage – caterpillar, pupa and butterfly – and tips to create native butterfly habitat. ---+ More Great Deep Look episodes: What Gives the Morpho Butterfly Its Magnificent Blue? https://www.youtube.com/watch?v=29Ts7CsJDpg This Vibrating Bumblebee Unlocks a Flower's Hidden Treasure https://www.youtube.com/watch?v=SZrTndD1H10 Roly Polies Came From the Sea to Conquer the Earth https://www.youtube.com/watch?v=sj8pFX9SOXE In the Race for Life, Which Human Embryos Make It? https://www.youtube.com/watch?v=9mv_kuwQvoc ---+ See some great videos and documentaries from the PBS Digital Studios! PBS Eons: When Did the First Flower Bloom? https://www.youtube.com/watch?v=13aUo5fEjNY CrashCourse: The History of Life on Earth - Crash Course Ecology #1 https://www.youtube.com/watch?v=sjE-Pkjp3u4 ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

5 miesięcy temu

A Real Alien Invasion Is Coming to a Palm Tree Near You | Deep Look

The South American palm weevil is bursting onto the scene in California. Its arrival could put one of the state’s most cherished botanical icons at risk of oblivion. DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Summer means vacation time, and nothing says, “Welcome to paradise!” quite like a palm tree. Though it’s home to only one native species, California has nonetheless adopted the palm as a quintessential icon. But a new snake in California’s palm tree-lined garden may soon put all that to the test. Dozens of palms in San Diego’s Sweetwater Summit Regional Park, about 10 miles from the Mexican border, are looking more like sad, upside-down umbrellas than the usual bursts of botanical joy. The offender is the South American palm weevil, a recent arrival to the U.S. that’s long been widespread in the tropics. Large, black, shiny, and possessed of an impressive proboscis (nose), the weevil prefers the king of palms, the Canary Island date palm, also known as the “pineapple palm” for the distinctive way it’s typically pruned. A palm tree is basically a gigantic cake-pop, an enormous ball of veggie goodness on a stick. The adult female palm weevil uses her long snout to drill tunnels into that goodness—known to science as the “apical meristem” and to your grocer as the “heart” of the palm—where she lays her eggs. When her larvae hatch, their food is all around them. And they start to eat. If the South American palm weevil consolidates its foothold in California, then the worst might still be to come. While these weevils generally stick to the Canary Island palms, they can harbor a parasitic worm that causes red-ring disease—a fatal infection that can strike almost any palm, including the state’s precious native, the California fan. --- Where do South American Palm Weevils come from? Originally, Brazil and Argentina. They’ve become common wherever there are Canary Island Palm trees, however, which includes Europe, the Mediterranean, the Middle East. --- How do they kill palm trees? Their larvae eat the apical meristem, which is the sweet part of the plant sometimes harvested and sold commercially as the “heart of palm.” --- How do you get rid of them? If the palm weevils infest a tree, it’s very hard to save it, since they live on the inside, where they escape both detection and pesticides. Neighboring palm trees can be sprayed for protection. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/06/20/a-real-alien-invasion-is-coming-to-a-palm-tree-near-you ---+ For more information: Visit the UC Riverside Center for invasive Species Research: http://cisr.ucr.edu/invasive_species.html ---+ More Great Deep Look episodes: Decorator Crabs Make High Fashion at Low Tide https://www.youtube.com/watch?v=OwQcv7TyX04 Everything You Never Wanted to Know About Snail Sex https://www.youtube.com/watch?v=UOcLaI44TXA ---+ See some great videos and documentaries from the PBS Digital Studios! Gross Science: Meet The Frog That Barfs Up Its Babies https://www.youtube.com/watch?v=9xfX_NTrFRM Brain Craft: Mutant Menu: If you could, would you design your DNA? And should you be able to? https://www.youtube.com/watch?v=NrDM6Ic2xMM ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

5 miesięcy temu

These Fish Are All About Sex on the Beach | Deep Look

During the highest tides, California grunion stampede out of the ocean to mate on the beach. When the party's over, thousands of tiny eggs are left stranded up in the sand. How will their lost babies make it back to the sea? SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * With summer just around the corner, Southern California beaches are ready to welcome the yearly arrival of some very unique and amorous guests. That’s right, the grunion are running! California grunion are fish that spend their lives in the ocean. But when the tides are at their highest during spring and summer, grunion make a trip up onto beaches to mate and lay eggs. Grunion mate on beaches throughout southern California and down into into Mexico. The grunion runs have taken on a special importance to coastal communities Santa Barbara to San Diego. For some, coming out to see the grunion run has been an annual tradition for generations. For others it’s a rare chance to catch ocean fish with their bare hands. --- What are grunion? California grunion are schooling fish similar to sardines that live in the Pacific Ocean that emerge from the sea to lay their eggs on the sand of beaches in Southern California and down the Baja California Peninsula in Mexico. There are also smaller populations in Monterey Bay and San Francisco Bay. Another species, the Gulf Grunion lays their eggs in the northern shores of the Gulf of California. California Grunion are typically about six inches in length. --- Why do grunion mate on land? The ocean is full of predators who would like to gobble up a tasty fish egg. The grunion eggs tend to be safer up on the beach if they can make it there without raising the attention of predators like birds and raccoons. Grunion eggs have a tough outer layer that keeps them from drying out or being crushed by the sand. --- When do California grunion run? California grunion typically spawn from March to August. The fishing season is closed during the peak spawning times during May and June. See https://www.wildlife.ca.gov/fishing/ocean/grunion#28352306-2017-runs for more detailed info on grunion seasons. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/06/06/these-fish-are-all-about-sex-on-the-beach-deep-look/ ---+ For more information: http://www.grunion.org/ ---+ More Great Deep Look episodes: Sea Urchins Pull Themselves Inside Out to be Reborn | Deep Look https://www.youtube.com/watch?v=ak2xqH5h0YY Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly | Deep Look https://www.youtube.com/watch?v=Z3BHrzDHoYo The Amazing Life of Sand | Deep Look https://www.youtube.com/watch?v=VkrQ9QuKprE&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp&index=51 ---+ See some great videos and documentaries from the PBS Digital Studios! How Much Plastic is in the Ocean? | It's Okay To Be Smart https://www.youtube.com/watch?v=YFZS3Vh4lfI White Sand Beaches Are Made of Fish Poop | Gross Science https://www.youtube.com/watch?v=1SfxgY1dIM4 What Physics Teachers Get Wrong About Tides! | Space Time https://www.youtube.com/watch?v=pwChk4S99i4 ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio station in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration — exposing them to new people, places and ideas. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the David B. Gold Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

6 miesięcy temu

Behind the Scenes With Deep Look: The Diva Decorator Crabs

How long does it take to film a decorator crab putting on its seaweed hat? Hint: It's days, not hours. The Deep Look team is back with a second behind the scenes video! Get to know host Lauren Sommer and producers Gabriela Quiros, Josh Cassidy and Elliott Kennerson as we put together our episode on decorator crabs and reflect on the joys and challenges of making nature films. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * ---+ Episodes Featured in this video: The Snail-Smashing, Fish-Spearing, Eye-Popping Mantis Shrimp https://www.youtube.com/watch?v=Lm1ChtK9QDU Everything You Never Wanted to Know About Snail Sex https://www.youtube.com/watch?v=UOcLaI44TXA These Termites Turn Your House into a Palace of Poop https://www.youtube.com/watch?v=DYPQ1Tjp0ew Decorator Crabs Make High Fashion at Low Tide https://www.youtube.com/watch?v=OwQcv7TyX04 Roly Polies Came From the Sea to Conquer the Earth https://www.youtube.com/watch?v=sj8pFX9SOXE Why Does Your Cat's Tongue Feel Like Sandpaper? https://www.youtube.com/watch?v=9h_QtLol75I How Mosquitoes Use Six Needles to Suck Your Blood https://www.youtube.com/watch?v=rD8SmacBUcU The Bombardier Beetle And Its Crazy Chemical Cannon https://www.youtube.com/watch?v=BWwgLS5tK80 This Pulsating Slime Mold Comes in Peace (ft. It's Okay to Be Smart) https://www.youtube.com/watch?v=Nx3Uu1hfl6Q Sea Urchins Pull Themselves Inside Out to be Reborn https://www.youtube.com/watch?v=ak2xqH5h0YY These 'Resurrection Plants' Spring Back to Life in Seconds https://www.youtube.com/watch?v=eoFGKlZMo2g Nature's Mood Rings: How Chameleons Really Change Color https://www.youtube.com/watch?v=Kp9W-_W8rCM Pygmy Seahorses: Masters of Camouflage https://www.youtube.com/watch?v=Q3CtGoqz3ww If Your Hands Could Smell, You’d Be an Octopus https://www.youtube.com/watch?v=XXMxihOh8ps How Do Pelicans Survive Their Death-Defying Dives? https://www.youtube.com/watch?v=BfEboMmwAMw ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

6 miesięcy temu

Decorator Crabs Make High Fashion at Low Tide | Deep Look

When you live by the seashore, one day you're in, the next day you're lunch. So these crabs don the latest in seaweed outerwear and anemone accessories to blend in. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * As fans of the hit TV show Project Runway know, in fashion one day you’re in, and the next day you’re out. Nowhere is this truer than in the animal kingdom. One minute you’re a crab minding your own business in a tide pool, and the next, you’re a seagull’s snack. Unless you’re a decorator crab, that is, and you use this season’s seaweed to save your life. There are nearly 700 species of decorator crabs around the world – about a dozen of them in California, where they live in tide pools and kelp forests. They camouflage by decorating their heads, or their entire bodies depending on the species, with pieces of seaweed, anemones or other materials around them, which they attach securely to a natural Velcro that grows right on their bodies. “It’s not a glue or anything; they have these hooked hairs all over their shells,” said biologist Jay Stachowicz, who studies decorator crabs at the University of California, Davis. “Through microscope photography we can see that it looks just like Velcro, except probably even better, even more hooked.” These golden-colored hairs are thick and curled to form long rows. Some species of decorator crabs have these rows of hooked hairs only on their heads; others, on their entire bodies. At his lab at UC Davis’ Bodega Marine Lab in Bodega Bay, Stachowicz collects crabs off the coast, places them in tanks, gives them some seaweed and watches them go to work. The process is more exciting than watching Project Runway contestants create their confections, if you consider that the crabs are making it work with much more simple tools than the designers. And the stakes are much higher. --- How does a decorator crab camouflage? A pink Cryptic kelp crab, for example, cuts a piece of purple seaweed with one of its claws. Then the crab holds the piece of seaweed above its head, the only part of its body where it has hooked hairs. It moves the piece of seaweed back and forth, until it’s tightly wedged inside the hooks. Then it repeats the process. The result is a “hat” of bushy seaweed that protrudes beyond its head. With the seaweed, the crab is concealing two of its four antennae, short protuberances near its mouth. These antennae are constantly aflutter. The crab uses them to smell, and they could call the attention of predators even when the crab remains still. By hiding the movement of the antennae, the seaweed visor protects the crab from birds pecking around in the tide pools and aquatic predators like fish and octopuses. --- What is Tim Gunn’s most famous quote? The beloved advisor to contestants of Project Runway has many memorable phrases. But we’re pretty confident that one of his best-known sayings is “Make it work!” ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/05/09/decorator-crabs-make-high-fashion-at-low-tide/ ---+ For more information: Jay Stachowicz Lab at the University of California, Davis: http://www.eve.ucdavis.edu/stachowicz/research.shtml ---+ More Great Deep Look episodes: Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly https://www.youtube.com/watch?v=Z3BHrzDHoYo Pygmy Seahorses: Masters of Camouflage https://www.youtube.com/watch?v=Q3CtGoqz3ww Watch These Frustrated Squirrels Go Nuts! https://www.youtube.com/watch?v=ZUjQtJGaSpk ---+ See some great videos and documentaries from the PBS Digital Studios! Above The Noise: Why Do Our Brains Love Fake News? https://www.youtube.com/watch?v=dNmwvntMF5A&index=1&list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Braincraft: Do You Own Your Cells? https://www.youtube.com/watch?v=DIFTIYZrm0g&list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV&index=4 ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, California, serves Northern California and beyond with a public-supported alternative to commercial TV, radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

7 miesięcy temu

How Do Pelicans Survive Their Death-Defying Dives? | Deep Look

Brown pelicans hit the water at breakneck speed when they catch fish. Performing such dangerous plunges requires technique, equipment, and 30 million years of practice. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * California’s brown pelicans are one of two pelican species (once considered the same) that plunge from the air to hunt. The rest, like the white pelican, bob for fish at the water’s surface. The shape of its bill is essential to the birds' survival in these dives, reducing “hydrodynamic drag” — buckling forces, caused by the change from air to water — to almost zero. It’s something like the difference between slapping the water with your palm and chopping it, karate-style. And while all birds have light, air-filled bones, pelican skeletons take it to an extreme. As they dive, they inflate special air sacs around their neck and belly, cushioning their impact and allowing them to float. Even their celebrated pouches play a role. An old limerick quips, “A remarkable bird is a pelican / Its beak can hold more than its belly can…” That beak is more than just a fishing net. It’s also a parachute that pops open underwater, helping to slow the bird down. Behind the pelican’s remarkable resilience (and beaks) lies 30 million years of evolutionary stasis, meaning they haven’t changed much over time. --- What do pelicans eat? Pelicans eat small fish like anchovies, sardines, and smelt. --- How long to pelicans live? Pelicans live 15-25 years in the wild. --- How big are pelicans? Brown pelicans are small for pelicans, but still big for birds, with a 6-8 foot wingspan. Their average weight is 3.5 kg. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/04/25/volunteer-brown-pelican-count-aims-to-measure-recovery-of-once-endangered-birds/ ---+ For more information: U.S. Fish and Wildlife brown pelican page https://ecos.fws.gov/ecp0/profile/speciesProfile?spcode=B02L ---+ More Great Deep Look episodes: The Fantastic Fur of Sea Otters https://www.youtube.com/watch?v=Zxqg_um1TXI How Do Sharks and Rays Use Electricity to Find Hidden Prey? https://www.youtube.com/watch?v=JDPFR6n8tAQ ---+ See some great videos and documentaries from the PBS Digital Studios! Physics Girl: Why Outlets Spark When Unplugging https://www.youtube.com/watch?v=g1Ld8D2bnJM Gross Science: Everything You Didn’t Want to Know About Snot https://www.youtube.com/watch?v=shEPwQPQG4I ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

7 miesięcy temu

Identical Snowflakes? Scientist Ruins Winter For Everyone. | Deep Look

We've all heard that each and every snowflake is unique. But in a lab in sunny southern California, a physicist has learned to control the way snowflakes grow. Can he really make twins? SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * California's historic drought is finally over thanks largely to a relentless parade of powerful storms that have brought the Sierra Nevada snowpack to the highest level in six years, and guaranteed skiing into June. All that snow spurs an age-old question -- is every snowflake really unique? “It’s one of these questions that’s been around forever,” said Ken Libbrecht, a professor of physics at the California Institute of Technology in Pasadena. “I think we all learn it in elementary school, the old saying that no two snowflakes are alike.” --- How do snowflakes form? Snow crystals form when humid air is cooled to the point that molecules of water vapor start sticking to each other. In the clouds, crystals usually start forming around a tiny microscopic dust particle, but if the water vapor gets cooled quickly enough the crystals can form spontaneously out of water molecules alone. Over time, more water molecules stick to the crystal until it gets heavy enough to fall. --- Why do snowflakes have six arms? Each water molecule is each made out of one oxygen atom and two hydrogen atoms. As vapor, the water molecules bounce around slamming into each other. As the vapor cools, the hydrogen atom of one molecule forms a bond with the oxygen of another water molecule. This is called a hydrogen bond. These bonds make the water molecules stick together in the shape of a hexagonal ring. As the crystal grows, more molecules join fitting within that same repeating pattern called a crystal array. The crystal keeps the hexagonal symmetry as it grows. --- Is every snowflake unique? Snowflakes develop into different shapes depending on the humidity and temperature conditions they experience at different times during their growth. In nature, snowflakes don’t travel together. Instead, each takes it’s own path through the clouds experiencing different conditions at different times. Since each crystal takes a different path, they each turn out slightly differently. Growing snow crystals in laboratory is a whole other story. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/04/11/identical-snowflakes-scientist-ruins-winter-for-everyone-deep-look/ ---+ For more information: Ken Libbrecht’s online guide to snowflakes, snow crystals and other ice phenomena. http://snowcrystals.com/ ---+ More Great Deep Look episodes: Can A Thousand Tiny Swarming Robots Outsmart Nature? | Deep Look https://www.youtube.com/watch?v=dDsmbwOrHJs What Gives the Morpho Butterfly Its Magnificent Blue? | Deep Look https://www.youtube.com/watch?v=29Ts7CsJDpg&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp&index=48 The Amazing Life of Sand | Deep Look https://www.youtube.com/watch?v=VkrQ9QuKprE&list=PLdKlciEDdCQDxBs0SZgTMqhszst1jqZhp&index=51 The Hidden Perils of Permafrost | Deep Look https://www.youtube.com/watch?v=wxABO84gol8 ---+ See some great videos and documentaries from the PBS Digital Studios! The Science of Snowflakes | It’s OK to be Smart https://www.youtube.com/watch?v=fUot7XSX8uA An Infinite Number of Words for Snow | PBS Idea Channel https://www.youtube.com/watch?v=CX6i2M4AoZw Is an Ice Age Coming? | Space Time | PBS Digital Studios https://www.youtube.com/watch?v=ztninkgZ0ws ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

8 miesięcy temu

These Fighting Fruit Flies Are Superheroes of Brain Science | Deep Look

Thanks to The Great Courses Plus for sponsoring this episode of Deep Look. Try a 30 day trial of The Great Course Plus at http://ow.ly/7QYH309wSOL. If you liked this episode, you might be interested in their course “Major Transitions in Evolution”. POW! BAM! Fruit flies battling like martial arts masters are helping scientists map brain circuits. This research could shed light on human aggression and depression. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Neuroscientist Eric Hoopfer likes to watch animals fight. But these aren’t the kind of fights that could get him arrested – no roosters or pit bulls are involved. Hoopfer watches fruit flies. The tiny insects are the size of a pinhead, with big red eyes and iridescent wings. You’ve probably only seen them flying around an overripe piece of fruit. At the California Institute of Technology, in Pasadena, Hoopfer places pairs of male fruit flies in tiny glass chambers. When they start fighting, they look like martial arts practitioners: They stand face to face and tip each other over; they lunge, roll around and even toss each other, sumo-wrestler style. But this isn’t about entertainment. Hoopfer is trying to understand how the brain works. When the aggressive fruit flies at Caltech fight, Hoopfer and his colleagues monitor what parts of their brains the flies are using. The researchers can see clusters of neurons lighting up. In the future, they hope this can help our understanding of conditions that tap into human emotional states, like depression or addiction. “Flies when they fight, they fight at different intensities. And once they start fighting they continue fighting for a while; this state persists. These are all things that are similar to (human) emotional states,” said Hoopfer. “For example, there’s this scale of emotions where you can be a little bit annoyed and that can scale up to being very angry. If somebody cuts you off in traffic you might get angry and that lasts for a little while. So your emotion lasts longer than the initial stimulus.” Circuits in our brains that make us stay mad, for example, could hold the key to developing better treatments for mental illness. “All these neuro-psychiatric disorders, like depression, addiction, schizophrenia, the drugs that we have to treat them, we don’t really understand exactly how they are acting at the level of circuits in the brain,” said Hoopfer. “They help in some cases the symptoms that you want to treat. But they also cause a lot of side effects. So what we’d ideally like are drugs that can act on the specific neurons and circuits in the brain that are responsible for depression and for the symptoms of depression that we want to treat, and not ones that control other things.” --- What do fruit flies eat? In the lab, researchers feed fruit flies yeast and apple juice. --- How do I get rid of fruit flies in my house? Fruit flies are attracted to ripe fruit and vegetables. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/03/28/these-fighting-fruit-flies-are-superheroes-of-brain-science/ ---+ For more information: The David Anderson Lab at Caltech: https://davidandersonlab.caltech.edu/ ---+ More Great Deep Look episodes: How Mosquitoes Use Six Needles to Suck Your Blood https://www.youtube.com/watch?v=rD8SmacBUcU Meet the Dust Mites, Tiny Roommates That Feast On Your Skin https://www.youtube.com/watch?v=ACrLMtPyRM0 ---+ See some great videos and documentaries from the PBS Digital Studios! It’s Okay To Be Smart: Why Your Brain Is In Your Head https://www.youtube.com/watch?v=qdNE4WygyAk BrainCraft: Can You Solve This Dilemma? https://www.youtube.com/watch?v=9xHKxrc0PHg ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US market. The Great Courses Plus is currently working to both optimize the product globally and accept credit card payments globally. ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, California, serves Northern California and beyond with a public-supported alternative to commercial TV, radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

8 miesięcy temu

Everything You Never Wanted to Know About Snail Sex | Deep Look

Besides being hermaphrodites — all snails have both boy and girl parts — they stab each other with “love darts” as a kind of foreplay. SURVEY LINK: http://surveymonkey.com/r/pbsds2017 SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. The sex life of the common snail is anything but ordinary. First, they’re hermaphrodites, fitted with both male and female reproductive plumbing, and can mate with any member of their species they want. Sounds easy, but the battle of the sexes is alive and well in gastropods. In nature, fatherhood is easier. It’s the quickest, cheapest way to pass on your genes. Motherhood requires a much greater investment of time, energy, and resources. During courtship, the snails will decide who gets to be more father than mother. But their idea of courtship is to stab each other with a tiny spike called a love dart. The love dart is the snails’ tool for maximizing their male side. It injects hormones to prevent the other snail’s body from killing newly introduced sperm once copulation begins. When snails copulate, two penises enter two vaginal tracts. Both snails in the pairing transfer sperm, but whichever snail got in the best shot with the dart has a better chance of ultimately fertilizing eggs. In some species, only one snail fires a love dart, but in others, like the garden snail, both do. You can spot love darts sticking out of snails in mid-courtship, and even find them abandoned in slime puddles where mating has been happening. Scale it up to human size and the love dart would be the equivalent of a 15-inch knife. --- How common is hermaphroditism? Less than one percent of animal species are hermaphrodites. They’re most common among arthropods, the phylum of life that includes snails. --- How do hermaphrodites decide who’s going to the male and female? In most cases, both individuals will be both male and female, to some extent. Sometimes, like with garden snails, it’s a question of degree. --- Can a love dart kill the snail? In theory yes, but not very often. One researcher told us that in the thousands of matings he’s observed, he’s seen only one snail die that way. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/03/14/everything-you-never-wanted-to-know-about-snail-sex/ ---+ For more information: Visit Joris Koene’s site. He’s one of the world’s foremost snail and slug researchers: http://www.joriskoene.com/ ---+ More Great Deep Look episodes: Banana Slugs: Secret of the Slime https://www.youtube.com/watch?v=mHvCQSGanJg The Ladybug Love-In: A Valentine's Special https://www.youtube.com/watch?v=c-Z6xRexbIU ---+ See some great videos and documentaries from the PBS Digital Studios! Gross Science: Help a Snail Find True Love! https://www.youtube.com/watch?v=Vfkb2XyswJY 4 Valentine's Day Tips From the Animal World! https://www.youtube.com/watch?v=5lMa9CYG3SU ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED. education

9 miesięcy temu

Why Does Your Cat's Tongue Feel Like Sandpaper? | Deep Look

It's not vanity. For cats, staying clean is a matter of life and death. And their tongue, specially equipped for the job, is just one of the things that makes cats such successful predators. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Even after thousands of years sharing our homes, cats still remain mysterious. For one thing, they spend an inordinate amount of time grooming themselves, up to half of their waking hours. But all of that primping isn’t about vanity. For ambush predators like cats, staying clean is a matter of life and death. In this episode of Deep Look we get up close and personal with these fastidious felines. By looking closely at cat tongues, research at MIT and Georgia Tech reveals clues to cats’ predatory prowess and finds inspiration for new technologies. --- Why do cat’s tongues feel like sandpaper? Cats’ tongues are covered in little spines called “papillae” that look like tiny hooks. Cats use their tongues to groom and the spines do a great job of detangling knots. --- Why do cats spend so much time grooming? Cat’s spend much of their day cleaning themselves- up to half of their waking hours! Cats are ambush predators and they need to stay clean in order to remain hidden from their prey. Prey species tend to be on the lookout for danger, and one whiff of the wrong odor can give the cat away. --- Why do cats drink with their tongues? Like most other mammals that are predators, cats have wide mouths to help them sink their teeth deep into their prey. The large opening on the sides of their mouth helps them get a better bite, but it makes it hard for them to create suction in order to drink. Instead they use their tongue to draw water up from the surface into a column. They then bite the column to get the water. They usually lap about four times per second. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/02/28/why-does-your-cats-tongue-feel-like-sandpaper/ ---+ For more information: How Cats Lap: Water Uptake by Felis catus http://science.sciencemag.org/content/330/6008/1231 ---+ More Great Deep Look episodes: If Your Hands Could Smell, You’d Be an Octopus | Deep Look https://www.youtube.com/watch?v=XXMxihOh8ps Archerfish Says..."I Spit in Your Face!" | Deep Look https://www.youtube.com/watch?v=gN81dtxilhE Roly Polies Came From the Sea to Conquer the Earth | Deep Look https://www.youtube.com/watch?v=sj8pFX9SOXE ---+ See some great videos and documentaries from the PBS Digital Studios! Pigeon Story: How the Rock Dove Became the Sky Rat | It’s OK to be Smart https://www.youtube.com/watch?v=L8Y7Q1eja-E Everything is Trying to Kill You https://www.youtube.com/watch?v=LB8SqTwT93E ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

9 miesięcy temu

If Your Hands Could Smell, You’d Be an Octopus | Deep Look

Those hundreds of powerful suckers on octopus arms do more than just stick. They actually smell and taste. This contributes to a massive amount of information for the octopus’s brain to process, so octopuses depend on their eight arms for help. (And no, it's not 'octopi.') To keep up with Amy Standen, subscribe to her podcast The Leap - a podcast about people making dramatic, risky changes: https://ww2.kqed.org/news/programs/the-leap/ DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. Explore big scientific mysteries by going incredibly small. SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt * NEW VIDEOS EVERY OTHER TUESDAY! * Everyone knows that an octopus has eight arms. And similar to our arms it uses them to grab things and move around. But that’s where the similarities end. Hundreds of suckers on each octopus arm give them abilities people can only dream about. “The suckers are hands that also smell and taste,” said Rich Ross, senior biologist and octopus aquarist at the California Academy of Sciences. Suckers are “very similar to our taste buds, from what little we know about them,” said University of North Carolina, Chapel Hill, cephalopod biologist William Kier. If these tasting, smelling suckers make you think of a human hand with a tongue and a nose stuck to it, that’s a good start. It all stems from the unique challenges an octopus faces as a result of having a flexible, soft body. “This animal has no protection and is a wonderful meal because it’s all muscle,” said Kier. So the octopus has adapted over time. It has about 500 million neurons (dogs have around 600 million), the cells that allow it to process and communicate information. And these neurons are distributed to make the most of its eight arms. An octopus’ central brain – located between its eyes – doesn’t control its every move. Instead, two thirds of the animal’s neurons are in its arms. “It’s more efficient to put the nervous cells in the arm,” said neurobiologist Binyamin Hochner, of Hebrew University, in Jerusalem. “The arm is a brain of its own.” This enables octopus arms to operate somewhat independently from the animal’s central brain. The central brain tells the arms in what direction and how fast to move, but the instructions on how to reach are embedded in each arm. Octopuses have also evolved mechanisms that allow their muscles to move without the use of a skeleton. This same muscle arrangement enables elephant trunks and mammals’ tongues to unfurl. “The arrangement of the muscle in your tongue is similar to the arrangement in the octopus arm,” said Kier. In an octopus arm, muscles are arranged in different directions. When one octopus muscle contracts, it’s able to stretch out again because other muscles oriented in a different direction offer resistance – just as the bones in vertebrate bodies do. This skeleton of muscle, called a muscular hydrostat, is how an octopus gets its suckers to attach to different surfaces. --- How many suction cups does an octopus have on each arm? It depends on the species. Giant Pacific octopuses have up to 240 suckers on each arm. --- Do octopuses have arms or tentacles? Octopuses have arms, not tentacles. “The term ‘tentacle’ is used for lots of fleshy protuberances in invertebrates,” said Kier. “It just happens that the eight in octopuses are called arms.” --- Can octopuses regrow a severed arm? Yes! ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/02/14/if-your-hands-could-smell-youd-be-an-octopus/ ---+ For more information: The octopus research group at the Hebrew University of Jerusalem: https://www.youtube.com/watch?v=gN81dtxilhE ---+ More Great Deep Look episodes: You're Not Hallucinating. That's Just Squid Skin. https://www.youtube.com/watch?v=0wtLrlIKvJE Watch These Frustrated Squirrels Go Nuts! https://www.youtube.com/watch?v=ZUjQtJGaSpk ---+ See some great videos and documentaries from the PBS Digital Studios! It’s Okay To Be Smart: Is This A NEW SPECIES?! https://www.youtube.com/watch?v=asZ8MYdDXNc BrainCraft: Your Brain in Numbers https://www.youtube.com/watch?v=FFcbnf07QZ4 ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

10 miesięcy temu

Welcome to Deep Look, with New Host Lauren Sommer | PBS Digital Studios | KQED

DEEP LOOK - Watch science and nature videos up close (really, really close). Twice a month, get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. SUBSCRIBE: http://goo.gl/8NwXqt All-NEW EPISODES EVERY OTHER TUESDAY! More about our new host, Lauren Sommer: http://blogs.kqed.org/pressroom/deeplooknewhostvideos2017/

10 miesięcy temu

Archerfish Says..."I Spit in Your Face!" | Deep Look

The archerfish hunts by spitting water at terrestrial targets with weapon-like precision, and can even tell human faces apart. Is this fish smarter than it looks? SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. * NEW VIDEOS EVERY OTHER TUESDAY! * Humans always have assumed we’ve cornered the market on intelligence. But because of archerfish and other bright lights in the animal kingdom, that idea is itself evolving. Archerfish normally make their living in the mangrove forests of Southeast Asia and Australia, where they spit water at ants, beetles and other insects living on the trees’ half-submerged roots. The fish’s high-pressure projectiles knock prey from their perches into the water, and the fish swoops in. This novel feeding behavior, restricted to only seven species of fish, has attracted the attention of researchers ever since it was first described in 1764. The jet’s tip and tail unite at the moment of impact, which is critical to the success of the attack, especially as the target distance approaches the limit of the fish’s maximum spitting range of about six feet. The fish accomplishes this feat of timing through deliberate control of its highly-evolved mouthparts, in particular its lips, which act like an adjustable hose that can expand and contract while releasing the water. So in a way, to hit a target that’s further away, the fish doesn’t spit harder. It spits smarter. But just how smart is an archerfish? Using the archerfish’s spitting habits as a starting point, one researcher trained some lab fish to spit at an image of one human face with food rewards. Then, on a monitor suspended over the fish tank, she showed them a series of other faces, in pairs, adding in the familiar one. When the trained fish saw that familiar face, they would spit, to a high degree of accuracy. In a sense, the fish “recognized” the face, which should have been beyond the capacity of its primitive brain. --- Where do archerfish live? In Thailand, Australia, and other parts of Southeast Asia, usually in mangrove forests. --- What do archerfish eat? Insects and spiders that live close to the waterline. Archerfish won’t eat anything once it’s sinks too far below the surface. --- How do archerfish spit? They squeeze water through their mouth opening, using specially evolved mouthparts. ---+ Read the entire article on KQED Science: https://ww2.kqed.org/science/2017/01/31/archerfish-says-i-spit-in-your-face/ ---+ For more information: Visit the California Academy of Sciences: http://www.calacademy.org/ ---+ More Great Deep Look episodes: Sea Urchins Pull Themselves Inside Out to be Reborn https://www.youtube.com/watch?v=ak2xqH5h0YY Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly https://www.youtube.com/watch?v=Z3BHrzDHoYo ---+ See some great videos and documentaries from the PBS Digital Studios! Gross Science: Sea Cucumbers Have Multipurpose Butts https://www.youtube.com/watch?v=xjnvRKDdaWY Physics Girl: DIY Lightning Experiment! Make a SHOCKING Capacitor https://www.youtube.com/watch?v=rG7N_Zv6_gQ ---+ Follow KQED Science: KQED Science: http://www.kqed.org/science Tumblr: http://kqedscience.tumblr.com Twitter: https://www.twitter.com/kqedscience ---+ About KQED KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media. Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

10 miesięcy temu