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The Moon might be much bigger than you think it is.
Moon May! One video about cool moon stuff every Mo(o)nday in May. Next: Mars' strange Moons!
Videos, explaining things. Like evolution, time, space, global energy or our existence in this strange universe.
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How big is the moon really?
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The archerfish hunts by spitting water at terrestrial targets with weapon-like precision, and can even tell human faces apart. Is this fish smarter than it looks?
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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.
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Humans always have assumed we’ve cornered the market on intelligence. But because of archerfish and other bright lights in the animal kingdom, that idea is itself evolving.
Archerfish normally make their living in the mangrove forests of Southeast Asia and Australia, where they spit water at ants, beetles and other insects living on the trees’ half-submerged roots. The fish’s high-pressure projectiles knock prey from their perches into the water, and the fish swoops in.
This novel feeding behavior, restricted to only seven species of fish, has attracted the attention of researchers ever since it was first described in 1764.
The jet’s tip and tail unite at the moment of impact, which is critical to the success of the attack, especially as the target distance approaches the limit of the fish’s maximum spitting range of about six feet. The fish accomplishes this feat of timing through deliberate control of its highly-evolved mouthparts, in particular its lips, which act like an adjustable hose that can expand and contract while releasing the water.
So in a way, to hit a target that’s further away, the fish doesn’t spit harder. It spits smarter. But just how smart is an archerfish?
Using the archerfish’s spitting habits as a starting point, one researcher trained some lab fish to spit at an image of one human face with food rewards. Then, on a monitor suspended over the fish tank, she showed them a series of other faces, in pairs, adding in the familiar one.
When the trained fish saw that familiar face, they would spit, to a high degree of accuracy. In a sense, the fish “recognized” the face, which should have been beyond the capacity of its primitive brain.
--- Where do archerfish live?
In Thailand, Australia, and other parts of Southeast Asia, usually in mangrove forests.
--- What do archerfish eat?
Insects and spiders that live close to the waterline. Archerfish won’t eat anything once it’s sinks too far below the surface.
--- How do archerfish spit?
They squeeze water through their mouth opening, using specially evolved mouthparts.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....017/01/31/archerfish
---+ For more information:
Visit the California Academy of Sciences: http://www.calacademy.org/
---+ More Great Deep Look episodes:
Sea Urchins Pull Themselves Inside Out to be Reborn
https://www.youtube.com/watch?v=ak2xqH5h0YY
Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly
https://www.youtube.com/watch?v=Z3BHrzDHoYo
---+ See some great videos and documentaries from the PBS Digital Studios!
Gross Science: Sea Cucumbers Have Multipurpose Butts
https://www.youtube.com/watch?v=xjnvRKDdaWY
Physics Girl: DIY Lightning Experiment! Make a SHOCKING Capacitor
https://www.youtube.com/watch?v=rG7N_Zv6_gQ
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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
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.
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* 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:
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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 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.
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Sorry for uploading the videos without permission. Please do not remove the videos in my channel out of Youtube. Thank you very much.
ᴴᴰ Pato Donald y Chip y Dale dibujos animados - Pluto, Mickey Mouse Episodios Completos Nuevo 2018 HD.
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Train of Thought (Live) · a-ha
Scoundrel Days
℗ 1987 Warner Records Inc.
Writer: Paul Waaktaar-Savoy
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Caravelli E Sua Orquestra – Zingara
Genre:
Latin, Pop, Folk, World, & Country, Stage & Screen
Style:
Easy Listening, Chanson
Year:
1969
A-ha live @ Westfield, London, 28.07.2009. The band give a free lunchtime performance in the Westfield shopping centre before doing a signing session at HMV.
The mechanisms of evolution explained in one video.
The theory of evolution explains how the enormous variety of life could come into existence. How it is possible for primitive life forms to spawn the millions of different creatures, that exist today. Unfortunately, evolution is often misunderstood, because it's mechanisms seem counter intuitive. By using visualizations, infographics and appealing characters, the viewer is more likely to understand it the complex information. More than that, by presenting the information in an entertaining way, the information is more likely to sink in.
Short videos, explaining things. For example Evolution, the Universe, Stock Market or controversial topics like Fracking. Because we love science.
We would love to interact more with you, our viewers to figure out what topics you want to see. If you have a suggestion for future videos or feedback, drop us a line! :)
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How Evolution Works
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Dani interpreta "Listen" de Beyoncé en las cuartas audiciones a ciegas de la tercera edición de La Voz Kids.
Si estás en España:
- Puedes ver este vídeo en http://www.telecinco.es/lavozkids/ y el programa completo en http://www.mitele.es/programas....-tv/la-voz-kids/0000
- Descárgate la app de La Voz Kids para no perderte nada del programa http://mdia.st/1i8iNqu
Si estás fuera de España:
- Suscripción/Suscription: http://bit.ly/2mqAtky
Gordel om en zing mee met het officiële liedje van Blaze en de Monsterwielen! Met dit liedje kunnen jij en je kleuter volop genieten van de monsterwielen. Kinderen kunnen plezier maken met dit liedje en nog veel meer leuks op Nick Jr. en in de Nick Jr.-app. Oefen je Nederlands met je vriendjes van Blaze en de Monsterwielen! Kom racen met Blaze!
#BlazeandtheMonsterMachines #NickJr
Op je plaats
’t is tijd voor de race
een, twee, drie, hup Blaze
Dus stoelriemen vast en
We juichen en joelen
Als Blaze het helemaal maakt!
Blaze! Blaze! Blaze!
Sneller, sneller, sneller vooruit!
Blaze en de Monster Wielen
Go, go (Blaze!)
Blaze en de Monster Wielen
Go, go (Blaze!)
Blaze en de Monster Wielen
Hup Blaze!
Elephant seals rarely cross paths with humans but when they do they can really throw their weight around...
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ZoggFromBetelgeuse's solution: http://www.youtube.com/watch?v=pwl-rBVbWAY
This is a preliminary solution to the spinning disk trick based on the commonly cited tippe top explanation. I have my doubts that it tells the whole story because the disk seems to tilt, so the argument about constant angular velocity is in doubt. I wonder if the weight of the disk plays a more important role in making it flip. Plus, I think the disk appears to roll without slipping while the lighter side is moving down. This violates one of the assumptions of the tippe top explanation. So why am I publishing this now? I feel bad it has been two weeks and I haven't posted the answer yet so let's consider this a starting point for a work in progress...
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Yep, brown marmorated stink bugs are stinky, but that’s not the worst thing about them. They're imported agricultural pests eating their way across North America. But a native enemy from Asia – the tiny samurai wasp – has a particularly nasty method of stopping stink bugs in their tracks.
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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.
---
It looks rather harmless at first glance. With a speckled exterior and a shield-like shape, the brown marmorated stink bug doesn’t appear to be any different from any other six-legged insect that might pop up in your garden. But this particular bug, which arrived in the U.S. from Asia in the mid-1990s and smells like old socks when it is squashed, is a real nuisance. Not only can it invade homes by the thousands in the wintertime, it’s one formidable agricultural pest, eating millions of dollars of peaches, apples and other crops since 2010.
Scientists are now investigating a new tactic in the war on the stink bugs: the possibility of relying on one of the bug’s natural enemies, the samurai wasp.
Also native to Asia, this parasitic wasp keeps the stink bug population in check there. How?
---+ Read the entire article on KQED Science:
https://www.kqed.org/science/1....937639/samurai-wasps
---+ For more information:
Brown Marmorated Stink Bug Research at Oregon State University
http://bit.ly/2GB8RFs
---+ More Great Deep Look episodes:
These Hairworms Eat a Cricket Alive and Control Its Mind
https://youtu.be/YB6O7jS_VBM
Jerusalem Crickets Only Date Drummers
https://youtu.be/mHbwC-AIyTE
Turret Spiders Launch Sneak Attacks From Tiny Towers
https://youtu.be/9bEjYunwByw
---+ Shoutout!
?Congratulations ?to bujur10514, Ace _YT13, Iridescent Moonbeam, Salina Tran, and Noke Noke over at the Deep Look Community Tab, for correctly identifying the term 'Thigmotaxis:'
https://www.youtube.com/channe....l/UC-3SbfTPJsL8fJAPK
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Bill Cass, Justin Bull, Daniel Weinstein, David Deshpande, Daisuke Goto, Karen Reynolds, Yidan Sun, Elizabeth Ann Ditz, KW, Shirley Washburn, Tanya Finch, johanna reis, Shelley Pearson Cranshaw, Johnnyonnyful, Levi Cai, Jeanine Womble, Michael Mieczkowski, SueEllen McCann, TierZoo, James Tarraga, Willy Nursalim, Aurora Mitchell, Marjorie D Miller, Joao Ascensao, PM Daeley, Two Box Fish, Tatianna Bartlett, Monica Albe, Jason Buberel
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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 #stinkbugs #wildlife
Chameleons don't change color to match their environment; it’s just the opposite. How do they do it? By manipulating tiny crystals in their skin. Now, UC Berkeley researchers are on a quest to create synthetic chameleon skin inspired by these reptiles’ uncanny ability.
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 Chameleons Change Color?
Chameleons are some of the most brilliantly colored animals on the planet. But how did they evolve the ability to change color?
Scientists used to believe that chameleons changed color by spreading out pigments in their skin, much like octopuses or squid do.
The top layer of chameleon skin – called the epidermis – contains yellow pigment cells called xanthophores, and red pigment cells called erythrophores. But the amount of pigment in the cells stays the same, even when the chameleon changes color.
Just beneath the chameleon’s skin is a layer of cells called iridophores. These cells contain microscopic salt crystals, which are arranged in a three-dimensional pattern like oranges stacked on a fruit stand.
When light hits the crystals, some wavelengths are absorbed and some are reflected. The result, to our eyes, is the beautiful rainbow of colors on the chameleon’s skin. But what we’re actually seeing is light that is bouncing off of these tiny crystals. What we perceive as green, for example, is blue wavelengths of light being reflected off the crystals and through the layer of yellow xanthophore cells in the chameleon’s epidermis. The result is bright green skin that contains no green pigment!
The process of changing color is called metachrosis.
--- Why do Chameleons Change Color?
Chameleons don’t change color to match their environment. In fact, it’s just the opposite.
Their baseline is camouflage.
When chameleons are relaxed, they’re mostly green. They naturally blend into their home in the forest canopy. They even mimic leaves by dancing around a little.
But when they feel threatened, annoyed, or just want to show a little swagger, that’s when their color changes.
Scientists once thought that chameleons color-changing abilities allowed them to better camouflage themselves. Most species of chameleons live high in the forest canopy and their various shades of green provide natural camouflage. Even their movement provides camouflage – they dance around to mimic leaves blowing in the wind.
In fact, chameleons change color primarily to communicate with each other, as though they were living mood rings. Males will warn each other about their territory and females will change color to let males know whether they’re interested in breeding.
Chameleons also have a second layer of iridiophore cells just beneath the first. The crystals in that layer are larger and reflect light waves in the infrared wavelengths. This suggests that chameleons are also changing colors to regulate their temperature, according to Milinkovitch. Chameleons are cold-blooded and heat their bodies with the warmth of the sun.
Read the article for this video on KQED Science:
http://ww2.kqed.org/science/20....15/08/25/natures-moo
--- More great DEEP LOOK episodes:
Where Are the Ants Carrying All Those Leaves?
https://www.youtube.com/watch?v=-6oKJ5FGk24
What Happens When You Put a Hummingbird in a Wind Tunnel?
https://www.youtube.com/watch?v=JyqY64ovjfY
Pygmy Seahorses: Masters of Camouflage
https://www.youtube.com/watch?v=Q3CtGoqz3ww
--- Related video from the PBS Digital Studios Network!
Nature's Most Amazing Animal Superpowers - It’s Okay to be Smart
https://www.youtube.com/watch?v=e69yaWDkVGs
--- Other Great Science Videos About Chameleons
How Do Chameleons Change Color? - Veritasium
https://www.youtube.com/watch?v=SQggDnScsvI
True Facts About The Chameleon - zefrank1
https://www.youtube.com/watch?v=UR_byRbXxvs
--- 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
Ants don’t eat leaves. They use them to grow white tufts of nutritious fungus to feed their offspring. Their success as farmers has made leafcutter ants into fungus tycoons, complete with their own underground cities and huge half-inch soldiers to patrol them.
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.
What do ants eat?
Though leafcutter ants drink the sap in leaves for energy, they don’t eat them. Instead, they use them to grow something else. Leafcutters use leaf pieces to feed a fungus that grows in white tufts in their nests. The ants eat the fungus and feed it to their brood.
How old are ants?
To give you an idea, while humans have farmed for around 12,000 years, ants have been doing it for 60 million.
How many ants are there in the world?
If you bundled together all the ants in the world, there would be more of them than people – they’re the dominant biomass, says Brian Fisher, chair of the Department of Entomology at the California Academy of Sciences, in San Francisco. This is because all 30,000 species of ants are social. They have many ways of making a living.
How strong are ants?
Leafcutter ants haul leaf pieces through fields or forests to their underground nests. For a human, this feat would be the equivalent of carrying more than 600 pounds between our teeth.
Why are ants important to the soil?
The activity of ants aerates the soil, making it easier for water and oxygen to get through. They also contribute organic matter.
More great Deep Look episodes:
What Happens When You Put a Hummingbird in a Wind Tunnel?
https://www.youtube.com/watch?v=JyqY64ovjfY
Newt Sex: Buff Males! Writhing Females! Cannibalism!
https://www.youtube.com/watch?v=5m37QR_4XNY
Pygmy Seahorses: Masters of Camouflage
https://www.youtube.com/watch?v=Q3CtGoqz3ww
See also another great video from the PBS Digital Studios!
It's Okay to Be Smart: What's The Most Successful Species on Earth?
https://www.youtube.com/watch?v=fWc46NCnldo
And this one is also a favorite:
How to get Ants to carry a sign - Smarter Every Day 92
https://www.youtube.com/watch?v=-ZZzcw9ifDQ
Read an extended article on how leafcutter ants grow a fungus from leaf pieces:
http://ww2.kqed.org/science/20....15/06/11/where-are-t
If you’re in the San Francisco Bay Area, you can see live leafcutters at the Oakland Zoo or the California Academy of Sciences, in San Francisco.
http://www.oaklandzoo.org
http://www.calacademy.org
The compact book “The Leafcutter Ants: Civilization by Instinct,” by Bert Hölldobler and Edward O. Wilson, has detailed black and white drawings, photos and a fascinating description of the mating habits of leafcutter ant queens. The queen accumulates all the sperm she’ll need for her entire reproductive life during a single mating frenzy. After that, males are no longer necessary: Leafcutter colonies are made up entirely of female ants.
KQED Science: http://ww2.kqed.org/science
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Twitter: https://www.twitter.com/kqedscience
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
