An exiled leopard daughter needs to learn to hunt for herself.
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Natural World: Fishing Leopards
David Attenborough narrates the intimate story of a leopard mother and her two cubs. This family must survive in the wilds of Botswana alongside some less-than-friendly neighbours: lions, wild dogs and hyenas. The competition for food is tough, and if they are going to make it they must learn a new skill - they must learn to fish.

Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history content.

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Great video from BBC Earth epic Wild South America. Learn more about the secret life of Bromeliads, a type of plant that thrives in an extreme rainforest environment. Watch as the plant is used as a drinking well for thirsty tree top monkeys and a swimming pool for preening brightly coloured birds.

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Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history content.

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USA: Watch Blue Planet II on BBC America - 9pm Saturdays from 20th January 2018.
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*Chased By Angry Sea Lion - Blue Planet II Behind The Scenes*
As the team head back to base after a day of filming their path is blocked by a Sea lion who's not budging.

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The world is an amazing place full of stories, beauty and natural wonder. Explore the official BBC Earth YouTube channel and meet the animals and wildlife of your planet. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history documentaries. Dramatic, rare and wild nature doesn't get more exciting than this. Subscribe to be the first to view new animal documentary videos.

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Launching December 10th

Is levitation possible? YouTube Originals and BBC Studios bring you The Edge of Science, a scientific dive into the outer reaches of our understanding. Follow host and science enthusiast, Rick Edwards as he taps into the scientific community of YouTube to help him fulfill a lifetime's ambition - to levitate himself. Physics girl (Dianna Cowern) and science inventor, Colin Furze, join Rick and together, they will experiment their way into getting Rick off the ground, by physics alone. Can they do it?

Love learning on YouTube? Check out YouTube's new and improved learning hub (youtube.com/learning) for everything from well-being to history to how tos and all of the things in between. You'll also find more great YouTube Originals content full of your favourite YouTube Creators.

Take a journey through some of the coolest parts of our blue planet in this voyage around our beautiful poles with this 10 hour loop.
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#OurBluePlanet is a digital collaboration between BBC Earth and Ocean X Media with featured media from both companies. Join the conversation over on Twitter @OurBluePlanet.

Ocean X Media are a team of scientists, explorers and filmmakers driven to discover what lies beneath the waves and to document untold ocean stories. You can find out more here: http://www.oceanx.org

Watch more videos from BBC Earth:
Planet Earth http://bit.ly/PlanetEarthPlaylist
Blue Planet http://bit.ly/BluePlanetPlaylist
Planet Earth II http://bit.ly/PlanetEarthIIPlaylist
Planet Dinosaur http://bit.ly/PlanetDinoPlaylist

About BBC Earth:
The world is an amazing place full of stories, beauty and natural wonder. Explore the official BBC Earth YouTube channel and meet the animals and wildlife of your planet. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history documentaries. Dramatic, rare and wild nature doesn't get more exciting than this. Subscribe to be the first to view new animal documentary videos. You can also become part of the BBC Earth community on Facebook, Twitter and Instagram. Here you'll find the best natural history content from the web, exclusive videos and images and a thriving, vibrant community.

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This is a channel from BBC Studios who help fund new BBC programmes.

Music video by Ultravox performing Loves Great Adventure (2009 Digital Remaster).

http://vevo.ly/aQ7dNW

The killer punch of the mantis shrimp is the fastest strike in the animal kingdom, a skill that goes hand in hand with its extraordinary eyesight. They can see an invisible level of reality using polarized light, which could lead to a breakthrough in detecting cancer.

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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! *

Aggressive, reef-dwelling mantis shrimp take more than one first-place ribbon in the animal kingdom. Outwardly resembling their lobster cousins, their colorful shells contain an impressive set of superpowers.

There are two types of mantis shrimp, named for their attack mode while hunting prey: smashers and spearers. With their spring-loaded, weaponized legs, these predators can crack a snail shell or harpoon a passing fish in a single punch.

The speed of these attacks has earned the mantis shrimp one of their world records: fastest strike in the animal kingdom.

Scientists are finding that another of their special abilities -- incredible eyesight -- has potential life-saving implications for people with cancer.

Mantis shrimp can perceive the most elusive attribute of light from the human standpoint: polarization. Polarization refers to the angle that light travels through space. Though it’s invisible to the human eye, many animals see this quality of light, especially underwater.

But mantis shrimp can see a special kind of polarization, called circular polarization. Scientists have found that some mantis shrimp species use circular polarization to communicate with each other on a kind of secret visual channel for mating and territorial purposes.

Inspired by the mantis shrimp’s superlative eyesight, a group of researchers is collaborating to build polarization cameras that would constitute a giant leap for early cancer detection. These cameras see otherwise invisible cancerous tissues by detecting their polarization signature, which is different between diseased and healthy tissues.

--- How fast is the mantis shrimp punch?

Their strike is about as fast as a .22 caliber rifle bullet. It’s been measured at 50mph.

--- What do mantis shrimp eat?

The “smasher” mantis shrimp eat hard-shelled creatures like snails and crabs. The “spearers” grab fish, worms, seahorses, and other soft-bodied prey by impaling them.

--- Where do mantis shrimp live?

In reefs, from the east coast of Africa to the west coast of Australia, and throughout Indonesia. A few species are scattered around the globe, including two in California.

---+ Read the entire article on KQED Science:

https://ww2.kqed.org/science/2....016/11/15/the-snail-

---+ For more information:

Caldwell Lab at U.C. Berkeley: http://ib.berkeley.edu/labs/caldwell/

---+ More Great Deep Look episodes:

Nature's Scuba Divers: How Beetles Breathe Underwater
https://www.youtube.com/watch?v=T-RtG5Z-9jQ

Sea Urchins Pull Themselves Inside Out to be Reborn
https://www.youtube.com/watch?v=ak2xqH5h0YY

---+ See some great videos and documentaries from the PBS Digital Studios!

Physics Girl: The Ultraviolet Catastrophe
https://www.youtube.com/watch?v=FXfrncRey-4

Gross Science: What Sound Does An Ant Make?
https://www.youtube.com/watch?v=yif0c0bRA48

---+ Follow KQED Science:

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---+ 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.
#deeplook

At night, these parasites crawl onto your bed, bite you and suck your blood. Then they find a nearby hideout where they leave disgusting telltale signs. But these pests have an Achilles’ heel that stops them cold.

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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. Explore big scientific mysteries by going incredibly small.

Adult bed bugs are about the size and color of an apple seed. After biting, they hide in a nearby cranny, like the seam of the mattress.

At the University of California, Irvine, biologist and engineer Catherine Loudon is working to create synthetic surfaces that could trap bed bugs. She was inspired by the tiny hooked hairs that grow from the leaves of some varieties of beans, such as kidney and green beans. In nature, these hairs, called trichomes, pierce through the feet of the aphids and leafhoppers that like to feed on the plants.

Researchers have found that these pointy hairs are just as effective against bed bugs, even though the bloodsucking parasites don’t feed on leaves. Loudon’s goal is to mimic a bean leaf’s mechanism to create an inexpensive, portable bed bug trap.

“You could imagine a strip that would act as a barrier that could be placed virtually anywhere: across the portal to a room, behind the headboard, on subway seats, an airplane,” Loudon said. “They have six legs, so that’s six opportunities to get trapped.”

--- Where do bed bugs come from?
Bed bugs don’t fly or jump or come in from the garden. They crawl very quickly and hide in travelers’ luggage. They also move around on secondhand furniture, or from apartment to apartment.

--- How can I avoid bringing bed bugs home?
“It would probably be a prudent thing to do a quick bed check if you’re sleeping in a strange bed,” said Potter. His recommendation goes for hotel rooms, as well as dorms and summer camp bunk beds. He suggests pulling back the sheet at the head of the bed and checking the seams on the top and bottom of the mattress and the box spring.

---+ For more tips, read the entire article on KQED Science:
https://www.kqed.org/science/1....944245/watch-bed-bug

---+ More Great Deep Look Episodes:
‘Parasites are Dynamite’ Playlist: https://www.youtube.com/playli....st?list=PLdKlciEDdCQ

---+ ?Congratulations ?to the following fans for correctly identifying the creature's species name in our community tab challenge:

Stay in Your Layne
Brian Lee
Brad Denney
Elise Wade
Raminta’s Photography

https://www.youtube.com/channe....l/UC-3SbfTPJsL8fJAPK

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Allen, Aurora Mitchell, Beckie, Ben Espey, Bill Cass, Bluapex, Breanna Tarnawsky, Carl, Chris B Emrick, Chris Murphy, Cindy McGill, Companion Cube, Cory, Daisuke Goto, Daisy Trevino , Daniel Voisine, Daniel Weinstein, David Deshpande, Dean Skoglund, Edwin Rivas, Elizabeth Ann Ditz, Eric Carter, Geidi Rodriguez, Gerardo Alfaro, Ivan Alexander, Jane Orbuch, JanetFromAnotherPlanet, Jason Buberel, Jeanine Womble, Jeanne Sommer, Jiayang Li, Joao Ascensao, johanna reis, Johnnyonnyful, Joshua Murallon Robertson, Justin Bull, Kallie Moore, Karen Reynolds, Katherine Schick, Kendall Rasmussen, Kenia Villegas, Kristell Esquivel, KW, Kyle Fisher, Laurel Przybylski, Levi Cai, Mark Joshua Bernardo, Michael Mieczkowski, Michele Wong, Nathan Padilla, Nathan Wright, Nicolette Ray, Pamela Parker, PM Daeley, Ricardo Martinez, riceeater, Richard Shalumov, Rick Wong, Robert Amling, Robert Warner, Samuel Bean, Sayantan Dasgupta, Sean Tucker, Shelley Pearson Cranshaw, Shirley Washburn, Sonia Tanlimco, SueEllen McCann, Supernovabetty, Tea Torvinen, TierZoo, Titania Juang, Two Box Fish, WhatzGames, Willy Nursalim, Yvan Mostaza

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---+ 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. Deep Look is a project of KQED Science, which is also supported by the National Science Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Fuhs Family Foundation, Campaign 21 and the members of KQED.
#bedbug #bedbugtrap #bedbugbite

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Cone Snails have an arsenal of tools and weapons under their pretty shells. These reef-dwelling hunters nab their prey in microseconds, then slowly eat them alive.

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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. Explore big scientific mysteries by going incredibly small.

New research shows that cone snails — ocean-dwelling mollusks known for their brightly colored shells — attack their prey faster than almost any member of the animal kingdom.

There are hundreds of species of these normally slow-moving hunters found in oceans across the world. They take down fish, worms and other snails using a hollow, harpoon-like tooth that acts like a spear and a hypodermic needle. When they impale their prey, cone snails inject a chemical cocktail that subdues their meal and gives them time to dine at their leisure.

Cone snails launch their harpoons so quickly that scientists were previously unable to capture the movement on camera, making it impossible to calculate just how speedy these snails are. Now, using super-high-speed video, researchers have filmed the full flight of the harpoon for the first time.

From start to finish, the harpoon’s flight takes less than 200 micro-seconds. That’s one five-thousandth of a second. It launches with an acceleration equivalent to a bullet fired from a pistol.

So how do these sedentary snails pull off such a high-octane feat? Hydrostatic pressure — the pressure from fluid — builds within the half of the snail’s proboscis closest to its body, locked behind a tight o-ring of muscle. When it comes time to strike, the muscle relaxes, and the venom-laced fluid punches into the harpoon’s bulbous base. This pressure launches the harpoon out into the snail’s unsuspecting prey.

As fast as the harpoon launches, it comes to an even more abrupt stop. The base of the harpoon gets caught at the end of the proboscis so the snail can reel in its meal.

The high-speed action doesn’t stop with the harpoon. Cone snail venom acts fast, subduing fish in as little as a few seconds. The venom is filled with unique molecules, broadly referred to as conotoxins.

The composition of cone snail venom varies from species to species, and even between individuals of the same species, creating a library of potential new drugs that researchers are eager to mine. In combination, these chemicals work together to rapidly paralyze a cone snail’s prey. Individually, some molecules from cone snail venom can provide non-opioid pain relief, and could potentially treat Parkinson’s disease or cancer.

--- Where do cone snails live?

There are 500 species of cone snails living in the Indian and Pacific Oceans, the Caribbean and Red Seas, and the Florida coast.

--- Can cone snails kill humans?

Most of them do not. Only eight of those 500 species, including the geography cone, have been known to kill humans.

--- Why are scientists interested in cone snails?

Cone snail venom is derived from thousands of small molecules call peptides that the snail makes under its shell. These peptides produce different effects on cells, which scientists hope to manipulate in the treatment of various diseases.

---+ Read the entire article on KQED Science:
https://wp.me/p6iq8L-84uC

---+ For more information:

Here’s what WebMD says about treating a cone snail sting:
https://www.webmd.com/a-to-z-g....uides/cone-snail-sti

---+ More Great Deep Look episodes:

This Mushroom Starts Killing You Before You Even Realize It
https://www.youtube.com/watch?v=bl9aCH2QaQY

Take Two Leeches and Call Me in the Morning
https://youtu.be/O-0SFWPLaII

---+ See some great videos and documentaries from the PBS Digital Studios!

Space Time: Quantum Mechanics Playlist
https://www.youtube.com/watch?v=-IfmgyXs7z8&list=PLsPUh22kYmNCGaVGuGfKfJl-6RdHiCjo1

Above The Noise: Endangered Species: Worth Saving from Extinction?
https://www.youtube.com/watch?v=h5eTqjzQZDY

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---+ 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. Deep Look is a project of KQED Science, which is supported by the Templeton Religion Trust and the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation Fund and the members of KQED.
#deeplook

It's stealth, not speed that makes owls such exceptional hunters. Zoom way in on their phenomenal feathers to see what makes them whisper-quiet.

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.

--- How do owls hunt silently?

When birds flap their wings it creates turbulences in the air as it rushes over their wings. In general, the larger a bird is and the faster it flies, the larger the turbulence created and that means more sound.

The feathers at the leading edge of an owl’s wings have an unusual serrated appearance, referred to as a comb or fringe. The tiny hooked projections stick out and break up the wind as it flows over the owl’s wings reducing the size and sound of the turbulences.

Owl feathers go one step further to control sound. When viewed up-close, owl feathers appear velvety. The furry texture absorbs and dampens sound like a sound blanket. It also allows the feathers to quietly slide past each other in flight, reducing rusting sounds.

--- Why do owls hunt at night?

Owls belong to a group called raptors which also so includes with hawks, eagles and falcons. Most of these birds of prey hunt during the day and rely on. But unlike most other raptors, the roughly 200 species of owl are generally nocturnal while others are crepuscular, meaning that they’re active around dawn and dusk.

They have extremely powerful low-light vision, and finely tuned hearing which allows them to locate the source of even the smallest sound. Owls simply hide and wait for their prey to betray its own location. As ambush hunters, owls tend to rely on surprise more often than their ability to give chase.

--- Why do owls hoot?

With Halloween around the corner, you might have noticed a familiar sound in the night. It’s mating season for owls and the sound of their hooting fills the darkness.

According to Chris Clark, an an assistant professor of biology at UC Riverside,, “The reason why owls are getting ready to breed right now in the late fall is because they breed earlier than most birds. The bigger the bird the longer it takes for them to incubate their eggs and for the nestlings to hatch out and or the fledglings to leave the nest. Owls try to breed really early because they want their babies to be leaving the nest and practicing hunting right when there are lots of baby animals around like baby rabbits that are easy prey.”

--- More great DEEP LOOK episodes:

Halloween Special: Watch Flesh-Eating Beetles Strip Bodies to the Bone
https://www.youtube.com/watch?v=Np0hJGKrIWg

What Happens When You Put a Hummingbird in a Wind Tunnel?
https://www.youtube.com/watch?v=JyqY64ovjfY

You're Not Hallucinating. That's Just Squid Skin.
https://www.youtube.com/watch?v=0wtLrlIKvJE

--- Super videos from the PBS Digital Studios Network!

Did Dinosaurs Really Go Extinct? - It's Okay to be Smart
https://www.youtube.com/watch?v=3_RLz0whDv4

The Surprising Ways Death Shapes Our Lives - BrainCraft
https://www.youtube.com/watch?v=Joalg73L_gw

Crazy pool vortex - Physics Girl
https://www.youtube.com/watch?v=pnbJEg9r1o8

--- More KQED SCIENCE:

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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.
#deeplook

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?

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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/2....017/04/11/identical-

---+ 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.
#deeplook

With their big heads and beady black eyes, Jerusalem crickets aren't winning any beauty contests. But that doesn't stop them from finding mates. They use their bulbous bellies to serenade each other with some furious drumming.

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--

DEEP LOOK is an 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. Explore big scientific mysteries by going incredibly small.

Potato Bug. Child of the Earth. Old Bald-Headed Man. Skull Insects. Devil’s Baby. Spawn of Satan. There’s a fairly long list of imaginative nicknames that refer to Jerusalem crickets, those six-legged insects with eerily humanlike faces and prominent striped abdomens. And they can get quite large, too: Some measure over 3 inches long and weigh more than a mouse, so they can be quite unnerving if you see them crawling around in your backyard in summertime.

One individual who finds them compelling, and not creepy, has been studying Jerusalem crickets for over 40 years: David Weissman, a research associate in entomology affiliated with the California Academy of Sciences in San Francisco. He’s now considered the world’s foremost expert, since no one else has been as captivated or singlemindedly devoted to learning more about them.

While much of their general behavior is still not widely understood, Jerusalem crickets typically live solitary lives underground. They’ll emerge at night to scavenge for roots, tubers and smaller insects for their meals. And it’s also when they come out to serenade potential partners with a musical ritual: To attract a mate, adult crickets use their abdomens to drum the ground and generate low-frequency sound waves.

If a male begins drumming and a female senses the vibrations, she’ll respond with a longer drumming sequence so that he’ll have enough time to track her down. The drumming can vary between one beat every other second up to 40 beats per second.

---+ Read the entire article on KQED Science:
https://www.kqed.org/science/1....932923/jerusalem-cri

---+ For more information:

JERUSALEM! CRICKET? (Orthoptera: Stenopelmatidae: Stenopelmatus); Origins of a Common Name https://goo.gl/Y49GAK

---+ More Great Deep Look episodes:

The House Centipede is Fast, Furious, and Just So Extra | Deep Look
https://youtu.be/q2RtbP1d7Kg

Roly Polies Came From the Sea to Conquer the Earth | Deep Look
https://youtu.be/sj8pFX9SOXE

Turret Spiders Launch Sneak Attacks From Tiny Towers | Deep Look
https://youtu.be/9bEjYunwByw

---+ Shoutout!

?Congratulations ? to Piss Dog, Trent Geer, Mario Stankovski, Jelani Shillingford,
and Chaddydaddy who were the first to correctly 3 the species of Jerusalem Cricket relatives of the Stenopelmatoidea superfamily in our episode, over at the Deep Look Community Tab:

https://www.youtube.com/channe....l/UC-3SbfTPJsL8fJAPK

(hat tip to Antonio Garcia, who shared 3 full species names)


---+ Follow KQED Science and Deep Look:

Instagram: https://www.instagram.com/kqedscience/
Twitter: https://www.twitter.com/kqedscience
KQED Science on kqed.org: http://www.kqed.org/science
Facebook Watch: https://www.facebook.com/DeepLookPBS/
Patreon: https://www.patreon.com/deeplook

---+ 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. Deep Look is a project of KQED Science, which is also supported by the National Science Foundation, the Templeton Religion Trust, the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation and the members of KQED. #deeplook #jerusalemcrickets #wildlife

Most flowering plants are more than willing to spread their pollen around. But some flowers hold out for just the right partner. Bumblebees and other buzz pollinators know just how to handle these stubborn flowers. They vibrate the blooms, shaking them until they give up the nutritious pollen.

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! *

In the summertime, the air is thick with the low humming of bees delivering pollen from one flower to the next. If you listen closely, a louder buzz may catch your ear.

This sound is the key to a secret stash of pollen that some flowers hide deep within their anthers, the male parts of the plant. Only pollinators that buzz in just the right way can vibrate tiny grains out of minuscule holes at the top of the anthers for a protein-rich snack.

The strategy, called buzz-pollination, is risky. But it’s also critical to human agriculture. Tomatoes, potatoes and eggplants need wild populations of buzz pollinators, such as bumblebees, to produce fruit. Honeybees can’t do it.

Plants need a way to get the pollen — basically sperm — to the female parts of another flower. Most plants lure animal pollinators to spread these male gametes by producing sugary nectar. The bee laps up the sweet reward, is dusted with pollen and passively delivers it to the next bloom.

In contrast, buzz-pollinated flowers encourage bees to eat the pollen directly and hope some grains will make it to another flower. The evolutionary strategy is baffling to scientists.

“The flower is almost like playing hard to get,” says Anne Leonard, a biologist at the University of Nevada, Reno who studies buzz pollination. “It’s intriguing because these buzz-pollinated plants ask for a huge energy investment from the bees, but don’t give much back.”


--- What is buzz pollination?
Most flowering plants use sugary nectar as bait to attract bees and other pollinators, which get coated in pollen along the way. And since bees are messy, they inadvertently scatter some of that pollen onto the female part of the next flower they visit.

But some flowers lock their pollen up in their anthers, the male parts of the flower, instead of giving it away freely. The only way for the pollen to escape is through small holes called pores. Some pollinators like bumblebees (but not honeybees) are able to vibrate the flower’s anthers which shakes up the pollen and causes it to spew out of the pores.

The bumblebee collects the pollen and uses it as a reliable and protected source of protein.

--- What important crops use buzz pollination to make food?

The most important crops that use buzz pollination are potatoes, tomatoes, pumpkins, eggplants, cranberries and blueberries


--- What animals are capable of buzz pollination?
Many types of bees engage in buzz pollination, also called sonication. The most common is probably the bumblebee. Honeybees generally don’t use buzz pollination.

---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....016/07/19/this-vibra

---+ For more information:

Anne Leonard Lab, University of Nevada, Reno | Department of Biology
http://www.anneleonard.com/buzz-pollination/

---+ More Great Deep Look episodes:

These Lizards Have Been Playing Rock-Paper-Scissors for 15 Million Years | Deep Look
https://www.youtube.com/watch?v=rafdHxBwIbQ

Winter is Coming For These Argentine Ant Invaders | Deep Look
https://www.youtube.com/watch?v=boyzWeHdtiI

---+ See some great videos and documentaries from the PBS Digital Studios!

It's Okay to Be Smart: Why Don't Other Animals Wear Glasses?
https://www.youtube.com/watch?v=LhubEq6W9GE

Gross Science: The World's Most Expensive Fungus
https://www.youtube.com/watch?v=iV4WHFU2Id8

---+ 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 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.
#deeplook

What if you had to grow 20 pounds of bone on your forehead each year just to find a mate? In a bloody, itchy process, males of the deer family grow a new set of antlers every year, use them to fend off the competition, and lose their impressive crowns when breeding season ends.

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.

* WE’RE TAKING A BREAK FOR THE HOLIDAYS. WATCH OUR NEXT EPISODE ON JAN. 17, 2017. *

Antlers are bones that grow right out of an animal’s head. It all starts with little knobs called pedicles. Reindeer, elk, and their relatives in the cervid family, like moose and deer, are born with them. But in most species pedicles only sprout antlers in males, because antlers require testosterone.

The little antlers of a young tule elk, or a reindeer, are called spikes. Every year, a male grows a slightly larger set of antlers, until he becomes a “senior” and the antlers start to shrink.

While it’s growing, the bone is hidden by a fuzzy layer of skin and fur called velvet that carries blood rich in calcium and phosphorous to build up the bone inside.

When the antlers get hard, the blood stops flowing and the velvet cracks. It gets itchy and males scratch like crazy to get it off. From underneath emerges a clean, smooth antler.

Males use their antlers during the mating season as a warning to other males to stay away from females, or to woo the females. When their warnings aren’t heeded, they use them to fight the competition.

Once the mating season is over and the male no longer needs its antlers, the testosterone in its body drops and the antlers fall off. A new set starts growing almost right away.

--- What are antlers made of?

Antlers are made of bone.

--- What is antler velvet?

Velvet is the skin that covers a developing antler.

--- What animals have antlers?

Male members of the cervid, or deer, family grow antlers. The only species of deer in which females also grow antlers are reindeer.

--- Are antlers horns?

No. Horns, which are made of keratin (the same material our nails are made from), stay on an animal its entire life. Antlers fall off and grow back again each year.

---+ Read an article on KQED Science about how neuroscientists are investigating the potential of the nerves in antler velvet to return mobility to damaged human limbs, and perhaps one day even help paralyzed people:

https://ww2.kqed.org/science/2....016/12/06/rudolphs-a

---+ For more information on tule elk

https://www.nps.gov/pore/learn/nature/tule_elk.htm

---+ More Great Deep Look episodes:

The Sex Lives of Christmas Trees
https://www.youtube.com/watch?v=xEji9I4Tcjo

Watch These Frustrated Squirrels Go Nuts!
https://www.youtube.com/watch?v=ZUjQtJGaSpk

This Mushroom Starts Killing You Before You Even Realize It
https://www.youtube.com/watch?v=bl9aCH2QaQY

---+ See some great videos and documentaries from PBS Digital Studios!

The REAL Rudolph Has Bloody Antlers and Super Vision - Gross Science
https://www.youtube.com/watch?v=gB6ND8nXgjA

Global Weirding with Katharine Hayhoe: Texans don't care about climate change, right?
https://www.youtube.com/watch?v=P_r_6D2LXVs&list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV&index=25

It’s Okay To Be Smart: Why Don’t Woodpeckers Get Concussions?
https://www.youtube.com/watch?v=bqBxbMWd8O0

---+ 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.
#deeplook

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/2....017/02/14/if-your-ha

---+ 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.
#deeplook

It's an all-out brawl for prime beach real estate! These Caribbean crabs will tear each other limb from limb to get the best burrow. Luckily, they molt and regrow lost legs in a matter of weeks, and live to fight another day.

You can learn more about CuriosityStream at https://curiositystream.com/deeplook
Help Deep Look grow by supporting us on Patreon!!
https://www.patreon.com/deeplook

PBS Digital Studios Mega-playlist:

https://www.youtube.com/playli....st?list=PL1mtdjDVOoO

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. Explore big scientific mysteries by going incredibly small.

On the sand-dune beaches where they live, male blackback land crabs do constant battle over territory. The stakes are high: If one of these baby-faced crabs secures a winning spot, he can invite a mate into his den, six or seven feet beneath the surface.

With all this roughhousing, more than feelings get hurt. The male crabs inevitably lose limbs and damage their shells in constant dust-ups. Luckily, like many other arthropods, a group that includes insects and spiders, these crabs can release a leg or claw voluntarily if threatened. It’s not unusual to see animals in the field missing two or three walking legs.

The limbs regrow at the next molt, which is typically once a year for an adult. When a molt cycle begins, tiny limb buds form where a leg or a claw has been lost. Over the next six to eight weeks, the buds enlarge while the crab reabsorbs calcium from its old shell and secretes a new, paper-thin one underneath.

In the last hour of the cycle, the crab gulps air to create enough internal pressure to pop open the top of its shell, called the carapace. As the crab pushes it way out, the same internal pressure helps uncoil the new legs. The replacement shell thickens and hardens, and the crab eats the old shell.

--- Are blackback land crabs edible?

Yes, but they’re not as popular as the major food species like Dungeness and King crab.

--- Where do blackback land crabs live?

They live throughout the Caribbean islands.

--- Does it hurt when they lose legs?

Hard to say, but they do have an internal mechanism for releasing limbs cleanly that prevents loss of blood.

---+ Read the entire article on KQED Science:

https://www.kqed.org/science/1....933532/whack-jab-cra

---+ For more information:

The Crab Lab at Colorado State University:
https://rydberg.biology.colostate.edu/mykleslab/

---+ More Great Deep Look episodes:

Want a Whole New Body? Ask This Flatworm How
https://www.youtube.com/watch?v=m12xsf5g3Bo

Daddy Longlegs Risk Life ... and Especially Limb ... to Survive
https://www.youtube.com/watch?v=tjDmH8zhp6o

---+ See some great videos and documentaries from the PBS Digital Studios!

Origin of Everything: The Origin of Gender
https://www.youtube.com/watch?v=5e12ZojkYrU

Hot Mess: Coral Reefs Are Dying. But They Don’t Have To.
https://www.youtube.com/watch?v=MUAsFZuFQvQ

---+ 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. Deep Look is a project of KQED Science, which is also supported by the National Science Foundation, the Templeton Religion Trust, the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation and the members of KQED.

---+ Shoutout!

Congratulations to ?Jen Wiley?, who was the first to correctly ID the species of crab in our episode over at the Deep Look Community Tab:

https://www.youtube.com/channe....l/UC-3SbfTPJsL8fJAPK

#deeplook #pbsds #crab

Poema de D. Pedro Casaldáliga musicada pelo Grupo Kairoi da Espanha. Uma forma bonita de fazer memória de Maria.

El demonio tiene diez armas para que dejes de hacer oración.

Tekton es un canal de noticias católicas nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará, nuestra web es http://www.tekton.info

5 Extraordinarios Milagros Eucarísticos

Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, musica católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará

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Como vencer las tentaciones: 6 consejos de Jesús a Santa Faustina Kowalska


Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará

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