Top Vídeos
An Elephant family is crossing a river, but the currents are too strong and the calves risk getting swept away.
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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
24/7 Wild:
Witness the most charismatic animals on earth as they experience life's ultimate challenges in the first few vulnerable weeks of life. 24/7 Wild journeys with them to understand their tough rites of passage to adulthood and survival.
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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We've collected the most precious moments from our beloved canine companions: from cute puppies opening their eyes for the first time, to loyal wild dogs and incredibly intelligent pets.
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Watch more:
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
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 entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.
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This is a page from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vod-fe....edback--contact-deta
Lions of the Kalahari desert face water obstacles as they hunt Buffalo in this brilliant BBC wildlife footage from both land and air.
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WATCH MORE:
New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
Wild Thailand: https://bit.ly/2kR7lmh
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.
Want to share your views? Join our BBC Studios Voice: https://www.bbcstudiosvoice.com/register
This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vod-fe....edback--contact-deta
Coming across a rare pool of water, the elephant heard knows that its stagnant. Luckily, they know a trick which will still allow them to take a well needed drink.
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This is a channel from BBC Studios who help fund new BBC programmes.
At 150 strong this community of Chimps is the biggest yet found in Africa. Their numbers are so large they need a big territory with plenty of Fig trees, and they are willing to fight for it. Along with David Attenborough we get to witness the incredible stealth and brutality of a Chimp raid. Subscribe: http://bit.ly/BBCEarthSub
Taken From Planet Earth.
WATCH MORE:
New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
Wild Thailand: https://bit.ly/2kR7lmh
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.
Want to share your views? Join our BBC Studios Voice: https://www.bbcstudiosvoice.com/register
This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vod-fe....edback--contact-deta
Follow Ultravox:
Ultravox's Music Online: https://Ultravox.lnk.to/Listen
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Lyrics:
Standing on my own
It didn't mean that much to me
I thought I had it all
I didn't see the mystery
I stood the test of time
I took the step to find
Love's great adventure
I spoke a million words
They didn't mean that much to me
They rang around my head
Like empty tuneless harmonies
Love's great adventure mine
Lying side by side
It didn't mean that much to me
I started to enjoy
The poetry and symphonies
I took it in my stride
I hailed the Day i tried
Love's great adventure
A fool who couldn't see
It didn't mean that much to me
I couldn't understand
That's how the game is meant to be
Love's great adventure mine
Standing on my own
It didn't mean that much to me
I thought I had it all
I didn't see the mystery
I stood the test of time
I took the step to find
Love's great adventure
Music video by Ultravox performing Passing Strangers (2009 Digital Remaster).
http://vevo.ly/c2r2mx
Porcupines may be adorable, but their quills are razor-sharp, designed to impale and next to impossible to remove. But it's not all bad news. Researchers are designing new surgical staples that mimic the quill's shape to better close wounds and promote healing.
Check our PBS Sound Field!
https://www.youtube.com/channe....l/UCvMLMyKPomE6kTTL9
Meet Seth Samuel, Deep Look Composer!
https://www.patreon.com/posts/25828498
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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. Explore big scientific mysteries by going incredibly small.
The quills of North American porcupines have microscopic backward-facing barbs on the tips. Those barbs make the quills slide in easy but very difficult to remove.
Researchers at Harvard are looking to porcupine quills for inspiration in designing a new type of surgical staple that would also use tiny barbs to keep itself lodged into the patient’s skin. This helps because traditional staples curve in under the skin to keep the staple in place. This creates more damage and can provide a place for bacteria to infect the wound.
--- How do porcupines defend themselves?
If threatened, a porcupine will bristle, raising its quills. The quills are densest in an area on the porcupine's back called the rosette. The quills are coated in a grease secreted by the porcupine’s skin. When the porcupine exposes its quills it releases a musky odor unique to porcupines that serves as a warning.
The porcupine turns so that it’s head faces away from the attacker and chatters its teeth to make an audible warning. If that’s not enough, he porcupine will use its muscular tail, covered in quills, to slap their attacker if they get too close.
--- Do porcupines shoot their quills?
Porcupines do not shoot their quills out. That’s a myth. Porcupine quills are held by their skin in a way that makes them difficult to fall out unless pushed in first, usually by contact with an attacker. The tail moves so quickly that it can appear that it is shooting the quills out.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....019/04/09/porcupines
---+ For more information:
Professor Uldis Roze studies North American porcupines at Queens College at the City University of New York:
http://biology.qc.cuny.edu/peo....ple/faculty/dr-uldis
Dr. Jeff Karp is developing a new type of surgical staple inspired by the barbs on North American porcupine quills.
http://www.karplab.net/portfol....io-item/porcupine-in
---+ More Great Deep Look episodes:
How Lice Turn Your Hair Into Their Jungle Gym | Deep Look
https://www.youtube.com/watch?v=Yb26BBvAAWU&list=PLdKlciEDdCQBpNSC7BIONruffF_ab4cqK&index=47
Take Two Leeches and Call Me in the Morning | Deep Look
https://www.youtube.com/watch?v=O-0SFWPLaII&list=PLdKlciEDdCQBpNSC7BIONruffF_ab4cqK&index=19
---+ Shoutout!
Congratulations to ?Snowcube94, Marley Kang, Mr Spooks, David Bouslov, and NonEuclideanDreams?, who were the first to correctly ID the muscle (arrector pili) and a scientific name for the phenomenon known as goose bumps (piloerection, horripilation, or cutis anserina), over at the Deep Look Community Tab:
https://www.youtube.com/channe....l/UC-3SbfTPJsL8fJAPK
---+ Thank you to our Top Patreon Supporters ($10+ per month)!
Bill Cass, Justin Bull, Daniel Weinstein, Chris B Emrick, Karen Reynolds, Jeremy Lambert, David Deshpande, Daisuke Goto, Bugeyed.fr, WhatzGames, Elizabeth Ann Ditz, Robert Warner, Shirley Washburn, Tatianna Bartlett, KW, Tanya Finch, Elizabeth Wolden, Sayantan Dasgupta, Monica Albe, Willy Nursalim, Jenn's Bowtique, Jane Orbuch, Laurel Przybylski, Johnnyonnyful, Levi Cai, Jason Buberel, Mark Joshua Bernardo, Michael Mieczkowski, Jeanine Womble, Aurora Mitchell, Edwin Rivas, Marjorie D Miller, Companion Cube, Chris Murphy, Joao Ascensao, Two Box Fish, PM Daeley, TierZoo, Robert Amling, Shelley Pearson Cranshaw, Mario Rahmani
---+ Follow KQED Science and Deep Look:
Patreon: https://www.patreon.com/deeplook
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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.
There's a story in every grain of sand: tales of life and death, fire and water. If you scooped up a handful of sand from every beach, you'd have a history of the world sifting through your fingers.
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! *
---+ How does sand form?
Sand can be anything that has been worn down until it’s reduced to some tiny, essential fragment of what it once was: a granite pebble from the mountains; coral from the sea; obsidian from a volcano; even skeletons of microscopic sea animals. It's also a technical term. Bigger than sand, that’s gravel, smaller? Silt.
By studying the composition and texture of sand, geologists can reconstruct its incredible life history. “There’s just a ton of information out there, and all of it is in the sand,” said Mary McGann, a geologist at the United States Geological Survey in Menlo Park, CA.
McGann recently took part in a comprehensive research project mapping sand’s journey into and throughout San Francisco Bay.
Patrick Barnard, another USGS geologist who helped oversee the project, said that it will help scientists understand how local beaches are changing over time. In particular, Barnard wants to understand why beaches just south of San Francisco Bay are among the most rapidly eroding beaches in the state.
From 2010-2012, Barnard and his team sampled beaches, outcrops, rivers and creeks to track sand’s journey around the bay. They even collected sand from the ocean floor. The researchers then carefully analyzed the samples to characterize the shapes, sizes, and chemical properties of the sand grains.
Barnard said the information provides a kind of fingerprint, or signature, for each sample that can then be matched to a potential source. For example, certain minerals may only come from the Sierra Mountains or the Marin Headlands.
“If we’ve covered all of the potential sources, and we know the unique signature of the sand from these different sources, and we find it on a beach somewhere, then we basically know where it came from,” explained Barnard.
And those species aren’t the only things finding their way into the sand. Manmade materials can show up there, too. McGann has found metal welding scraps and tiny glass spheres (commonly sprinkled on highways to make road stripes reflective) in sand samples from around the bay.
“All of these things can get washed into our rivers or our creeks, or washed off the road in storm drains,” explained McGann. “Eventually they end up in, for example, San Francisco Bay.”
By piecing together all of these clues – the information found in the minerals, biological material and man made objects that make up sand – the researchers ended up with a pretty clear picture of how sand travels around San Francisco Bay.
Some sands stay close to home. Rocky sand in the Marin Headlands comes from nearby bluffs, never straying far from its source.
Other sands travel hundreds of miles. Granite from the Sierra Nevada mountains careens down rivers and streams on a century-long sojourn to the coast.
In fact, much of the sand in the Bay Area comes from the Sacramento and San Joaquin rivers, with local watersheds also playing an important role in transporting sand to the beach.
Although this project focused on San Francisco Bay, the same techniques could be used to study other coastal systems, he added, revealing the incredible life stories of sand from around the world.
---+ More Deep Look episodes:
What Happens When You Zap Coral With The World's Most Powerful X-ray Laser?
https://youtu.be/aXmCU6IYnsA
These 'Resurrection Plants' Spring Back to Life in Seconds
https://youtu.be/eoFGKlZMo2g
--
Full article: http://blogs.kqed.org/science/....2014/11/04/the-amazi
---+ Follow KQED Science:
KQED Science: http://www.kqed.org/science
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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
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
Are You Smarter Than A Slime Mold? Let’s go ask Joe Hanson: https://youtu.be/K8HEDqoTPgk
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.
---+ About Slime Molds
Flip over a rotting log and chances are you’ll see a goopy streak stuck to the wood. If you were to film this goop and play the video back in high speed, you’d see something that might remind you of the 1950s sci-fi classic “The Blob:” a jelly-like creature pulsating in a strange way, a little bit forward, a little bit back, spreading and searching for something to devour.
But this creature isn’t intent on world domination. It’s a slime mold, a very simple organism that is neither plant, nor animal, nor fungus. Unlike the cells of other living beings, which have only one nucleus that carries their genetic information, slime molds can organize into something like a cell with thousands of nuclei. Slime molds may move slowly, but they excite scientists by their ability to get a lot done with very little.
Researchers at the University of California San Diego and UC Davis have been focusing their attention on how slime molds get around, in the hope of inspiring a new generation of soft-bodied robots with medical applications.
Slime molds don’t have legs or any appendages. They eat bacteria and tiny fungi. And they move just by changing their shape.
“It’s intriguing to understand how they can move when they’re softer than the environment,” said UC San Diego engineer Juan Carlos Del Alamo. “The absence of limbs makes it a difficult problem.”
Slime mold’s locomotion is triggered by a chemical reaction. In the lab, Del Alamo and his colleagues cut off small pieces of a bright yellow slime mold called Physarum polycephalum and put them under a microscope. They watched each piece squeeze itself. This contraction is triggered by tiny calcium ions flowing inside it. The slime mold contracts its wall, then sloshes to move the calcium ions back so that they can trigger another contraction – at least that’s the researchers’ hypothesis.
---+ What are slime molds?
Let’s start with what they’re not. They can stand upright and produce spores. But they’re not fungi or plants. When they’re hungry, they spread across the forest chasing food such as tiny fungi or bacteria. But they’re not animals.
---+ Where are slime molds often found?
Slime molds are often found under rotting logs. You can also order the bright yellow slime mold in our video, Physarum polycephalum, from biological supplies companies. They’re fun to grow at home.
---+ What do slime molds eat?
In nature, slime molds eat tiny fungi and bacteria. When they’re grown in the lab, researchers feed them oats.
Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....016/04/19/this-pulsa
---+ More great DEEP LOOK episodes:
Can A Thousand Tiny Swarming Robots Outsmart Nature?
https://www.youtube.com/watch?v=dDsmbwOrHJs
This Mushroom Starts Killing You Before You Even Realize It
https://www.youtube.com/watch?v=bl9aCH2QaQY
Banana Slugs: Secret of the Slime
https://www.youtube.com/watch?v=mHvCQSGanJg&nohtml5=False
---+ More videos and documentaries from the PBS Digital Studios!
Gross Science: Why Am I Obsessed With Gross Stuff?
https://www.youtube.com/watch?v=8dfVN5w3_Y4
BrainCraft: The Prisoner's Dilemma
https://www.youtube.com/watch?v=p1KU7i5hpM8
---+ 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. 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.
#deeplook
Octopuses and cuttlefish are masters of underwater camouflage, blending in seamlessly against a rock or coral. But squid have to hide in the open ocean, mimicking the subtle interplay of light, water, and waves. How do they do it? (And it is NOT OCTOPI)
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! *
--- How do squid change color?
For an animal with such a humble name, market squid have a spectacularly hypnotic appearance. Streaks and waves of color flicker and radiate across their skin. Other creatures may posses the ability to change color, but squid and their relatives are without equal when it comes to controlling their appearance and new research may illuminate how they do it.
To control the color of their skin, cephalopods use tiny organs in their skin called chromatophores. Each tiny chromatophore is basically a sac filled with pigment. Minute muscles tug on the sac, spreading it wide and exposing the colored pigment to any light hitting the skin. When the muscles relax, the colored areas shrink back into tiny spots.
--- Why do squid change color?
Octopuses, cuttlefish and squid belong to a class of animals referred to as cephalopods. These animals, widely regarded as the most intelligent of the invertebrates, use their color change abilities for both camouflage and communication. Their ability to hide is critical to their survival since, with the exception of the nautiluses, these squishy and often delicious animals live without the protection of protective external shells.
But squid often live in the open ocean. How do you blend in when there's nothing -- except water -- to blend into? They do it by changing the way light bounces off their their skin -- actually adjust how iridescent their skin is using light reflecting cells called iridophores. They can mimic the way sunlight filters down from the surface. Hide in plain sight.
Iridophores make structural color, which means they reflect certain wavelengths of light because of their shape. Most familiar instances of structural color in nature (peacock feathers, mother of pearl) are constant–they may shimmer when you change your viewing angle, but they don't shift from pink to blue.
--- Read the article for this video on KQED Science:
http://ww2.kqed.org/science/20....15/09/08/youre-not-h
--- More great DEEP LOOK episodes:
What Gives the Morpho Butterfly Its Magnificent Blue?
https://www.youtube.com/watch?v=29Ts7CsJDpg
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
--- Related videos from the PBS Digital Studios Network!
Cuttlefish: Tentacles In Disguise - It’s Okay to Be Smart
https://www.youtube.com/watch?v=lcwfTOg5rnc
Why Neuroscientists Love Kinky Sea Slugs - Gross Science
https://www.youtube.com/watch?v=QGHiyWjjhHY
The Psychology of Colour, Emotion and Online Shopping - YouTube
https://www.youtube.com/watch?v=THTKv6dT8rU
--- More KQED SCIENCE:
Tumblr: http://kqedscience.tumblr.com
Twitter: https://www.twitter.com/kqedscience
KQED Science: http://ww2.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 #squid #octopus
Support Deep Look on Patreon!!
https://www.patreon.com/deeplook
Why can't you just flick a tick? Because it attaches to you with a mouth covered in hooks, while it fattens up on your blood. For days. But don't worry – there *is* a way to pull it out.
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. Explore big scientific mysteries by going incredibly small.
Spring is here. Unfortunately for hikers and picnickers out enjoying the weather, the new season is prime time for ticks, which can transmit bacteria that cause Lyme disease.
How they latch on – and stay on – is a feat of engineering that scientists have been piecing together. Once you know how a tick’s mouth works, you understand why it’s impossible to simply flick a tick.
The key to their success is a menacing mouth covered in hooks that they use to get under the surface of our skin and attach themselves for several days while they fatten up on our blood.
“Ticks have a lovely, evolved mouth part for doing exactly what they need to do, which is extended feeding,” said Kerry Padgett, supervising public health biologist at the California Department of Public Health in Richmond. “They're not like a mosquito that can just put their mouth parts in and out nicely, like a hypodermic needle.”
Instead, a tick digs in using two sets of hooks. Each set looks like a hand with three hooked fingers. The hooks dig in and wriggle into the skin. Then these “hands” bend in unison to perform approximately half-a-dozen breaststrokes that pull skin out of the way so the tick can push in a long stubby part called the hypostome.
“It’s almost like swimming into the skin,” said Dania Richter, a biologist at the Technische Universität Braunschweig in Germany, who has studied the mechanism closely. “By bending the hooks it’s engaging the skin. It’s pulling the skin when it retracts.”
The bottom of their long hypostome is also covered in rows of hooks that give it the look of a chainsaw. Those hooks act like mini-harpoons, anchoring the tick to us for the long haul.
“They’re teeth that are backwards facing, similar to one of those gates you would drive over but you're not allowed to back up or else you'd puncture your tires,” said Padgett.
--- How to remove a tick.
Kerry Padgett, at the California Department of Public Health, recommends grabbing the tick close to the skin using a pair of fine tweezers and simply pulling straight up.
“No twisting or jerking,” she said. “Use a smooth motion pulling up.”
Padgett warned against using other strategies.
“Don't use Vaseline or try to burn the tick or use a cotton swab soaked in soft soap or any of these other techniques that might take a little longer or might not work at all,” she said. “You really want to remove the tick as soon as possible.”
--- What happens if the mouth of a tick breaks off in your skin?
Don’t worry if the tick’s mouth parts stay behind when you pull.
“The mouth parts are not going to transmit disease to people,” said Padgett.
If the mouth stayed behind in your skin, it will eventually work its way out, sort of like a splinter does, she said. Clean the bite area with soap and water and apply antibiotic ointment.
---+ Read the entire article on KQED Science: https://www.kqed.org/science/1....920972/how-ticks-dig
---+ For more information:
Centers for Disease Control information on Lyme disease:
https://www.cdc.gov/lyme/
Mosquito & Vector Control District for San Mateo County, California:
https://www.smcmvcd.org/ticks
---+ More Great Deep Look episodes:
How Mosquitoes Use Six Needles to Suck Your Blood
https://www.youtube.com/watch?v=rD8SmacBUcU
So … Sometimes Fireflies Eat Other Fireflies
https://www.youtube.com/watch?v=oWdCMFvgFbo
---+ See some great videos and documentaries from the PBS Digital Studios!
Above the Noise: Are Energy Drinks Really that Bad?
https://www.youtube.com/watch?v=5l0cjsZS-eM
It’s Okay To Be Smart: Inside an ICE CAVE! - Nature's Most Beautiful Blue
https://www.youtube.com/watch?v=P7LKm9jtm8I
---+ 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 supported by 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 #ticks #tickbite
Male jumping spiders perform courtship dances that would make Bob Fosse proud. But if they bomb, they can wind up somebody's dinner instead of their mate.
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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! *
During courtship, the male jumping spider performs an exuberant dance to get the female’s attention. Like a pint-sized Magic Mike working for twenties, he shimmies from side to side, waves his legs, and flaps his front appendages (called pedipalps) in her direction.
If she likes what she sees, the female may allow him to mate. But things can also go terribly wrong for these eight-legged suitors. She might decide to attack him, or even eat him for lunch. Cannibalism is the result about seven percent of the time.
These mating rituals were first described more than 100 years ago. Their study took on a new dimension, however, when scientists discovered that the males also sing when they attempt to woo their lady loves.
By rubbing together their two body segments, equipped with a comb-shaped instrument, the males create vibrations that travel through the ground. The female spiders can “hear” the male songs through ear-like slits in their legs, called sensilla.
A male spider’s coordination of the dance and the song seems to affect his reproductive success — in other words, his ability to stay alive during this risky courtship trial. But what exactly the signals mean remains mysterious to scientists.
Scientists ultimately hope to understand how a female decides whether she’s looking at a stud — or a dud.
--- Where do jumping spiders get their name?
Jumping spiders don’t spin webs to catch food. They stalk their prey like cats. They use their silk as a drag line while they hop around.
--- What do jumping spiders eat?
Jumping spiders are carnivorous and eat insects like flies, bees, and crickets.
--- Where do jumping spiders live?
A map of jumping spider habitat looks like the whole world! Tropical forests contain the greatest number, but they live just about everywhere, even the Himalayan Mountains.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....016/10/04/for-these-
---+ For more information:
Elias Lab at U.C. Berkeley: https://nature.berkeley.edu/eliaslab/
---+ More great Deep Look episodes:
This Vibrating Bumblebee Unlocks a Flower's Hidden Treasure
https://www.youtube.com/watch?v=SZrTndD1H10
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!
Idea Channel: Do You Pronounce it GIF or GIF?
https://www.youtube.com/watch?v=bmqy-Sp0txY
Gross Science: Are There Dead Wasps In Figs?
https://www.youtube.com/watch?v=9DQTjv_u3Vc
---+ 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
A deadly fungus is attacking frogs’ skin and wiping out hundreds of species worldwide. Can anyone help California's remaining mountain yellow-legged frogs? In a last-ditch effort, scientists are trying something new: build defenses against the fungus through a kind of frog “vaccine.”
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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! *
Chytrid fungus has decimated some 200 amphibian species around the world, among them the mountain yellow-legged frogs of California’s Sierra Nevada mountain range.
Frogs need healthy skin to survive. They breathe and drink water through it, and absorb the sodium and potassium their hearts need to work.
In the late 1970s, chytrid fungus started getting into mountain yellow-legged frogs through their skin, moving through the water in their alpine lakes, or passed on by other frogs. The fungus destroys frogs’ skin to the point where they can no longer absorb sodium and potassium. Eventually, they die.
At the University of California, Santa Barbara, biologists Cherie Briggs and Mary Toothman did an experiment to see if they could save mountain yellow-legged frogs by immunizing them against chytrid fungus.
They grew some frogs from eggs. Then they infected them with chytrid fungus. The frogs got sick. Their skin sloughed off, as happens typically to infected frogs. But before the fungus could kill the frogs, the researchers treated them with a liquid antifungal that stopped the disease.
When the frogs were nice and healthy again, researchers re-infected them with chytrid fungus. They found that all 20 frogs they had immunized survived. Now the San Francisco and Oakland zoos are replicating the experiment and returning dozens of mountain-yellow legged frogs to the Sierra Nevada’s alpine lakes.
--- How does chytrid fungus kill frogs?
Spores of chytrid fungus burrow down into frogs’ skin, which gets irritated. They run out of energy. Sick frogs’ legs lock in the straight position when they try to hop. As they get sicker, their skin sloughs off in translucent sheets. The frogs can no longer absorb sodium and potassium their hearts needs to function. “It takes 2-3 weeks for a yellow-legged frog to die from chytridiomycosis,” said mountain yellow-legged frog expert Vance Vredenburg , of San Francisco State University. “Eventually they die from a heart attack.”
--- How does chytrid fungus spread?
Fungus spores, which have a little tail called a flagellum, swim through the water and attack a frog’s skin. The fungus can also get passed on from amphibian to amphibian.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....016/09/06/can-a-new-
---+ For more information:
AmphibiaWeb
http://www.amphibiaweb.org/chy....trid/chytridiomycosi
---+ More Great Deep Look episodes:
These Crazy Cute Baby Turtles Want Their Lake Back
https://www.youtube.com/watch?v=YTYFdpNpkMY
Newt Sex: Buff Males! Writhing Females! Cannibalism!
https://www.youtube.com/watch?v=5m37QR_4XNY
Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly
https://www.youtube.com/watch?v=Z3BHrzDHoYo
---+ See some great videos and documentaries from PBS Digital Studios!
It’s Okay To Be Smart: Do Plants Think?
https://www.youtube.com/watch?v=zm6zfHzvqX4
Gross Science: Why Get Your Tetanus Shot?
https://www.youtube.com/watch?v=O4jrqj5Dr8s
---+ 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
Support Deep Look on Patreon!! https://www.patreon.com/deeplook
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/2....017/06/20/a-real-ali
---+ 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.
#deeplook #palmweevil
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/pressroo....m/deeplooknewhostvid
#deeplook
Conoce la oración que el Padre Pio rezaba a la Virgen María
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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