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Víctor interpreta "Caresse Sur L'Ocean" de Los Chicos del Coro en el segundo Último Asalto de la cuarta edición de La Voz Kids.

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Elisa, Judith y Víctor interpretan "Memory" de Cats en las terceras batallas de la cuarta edición de La Voz Kids.

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Oriol interpreta "Perfect" de Ed Sheeran en la semifinal de la cuarta edición de La Voz Kids.

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Yastina, Helena Cruz y Valentina interpretan "What's love got to do with it" de Tina Turner en las primeras batallas de la cuarta edición de La Voz Kids.

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Melani interpreta "Nessun Dorma" de Pavarotti tras proclamarse ganara de la cuarta edición de La Voz Kids.

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Dr John Bradshaw explains why pet cats constantly miaow at their owners. Taken from Cats Uncovered.

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Watch what happens when a Giant Trevally versus an Tern in this amazing fish eats bird clip from Blue Planet II. Usually Giant trevally are solitary hunters but they have come in numbers to try their luck at catching potential prey. Subscribe: http://bit.ly/BBCEarthSub

Fledgling Tern are wary to spend too much time on the water but even flying close to the surface puts them in grave danger.

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Leopards and other big cats don't usually hunt in water, but these family of leopards is not afraid of getting wet and go fishing.
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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.

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

Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: http://tinyurl.com/YouTube-BBCEarth-FanPanel

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In Alaska, humpback whales feed on plankton in the shallow water. When one whale perishes in the treacherous waters, scavengers on the coastline such as black bears, wolves and gulls feed from the carcass.

Taken From Blue Planet Series 1

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New on Earth: https://bit.ly/2M3La96
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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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A single sea lion doesn't stand a chance against a pod of killer whales.
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New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
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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. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.

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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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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.

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! *

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:

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

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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

---+ 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. 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:

Tumblr: http://kqedscience.tumblr.com
Twitter: https://www.twitter.com/kqedscience
KQED Science: http://www.kqed.org/science


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?

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/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.

Support Deep Look on Patreon! https://www.patreon.com/deeplook
Come join us on our Deep Look Communty Tab: https://www.youtube.com/user/K....QEDDeepLook/communit

--

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)


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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 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