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Watch These Cunning Snails Stab and Swallow Fish Whole | Deep Look

user45
15 vistas · 7 años hace

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

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DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Explore big scientific mysteries by going incredibly small.

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

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

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

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

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

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

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

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

--- Where do cone snails live?

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

--- Can cone snails kill humans?

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

--- Why are scientists interested in cone snails?

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

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

---+ For more information:

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

---+ More Great Deep Look episodes:

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

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

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

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

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

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---+ About KQED

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

Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, which is supported by the Templeton Religion Trust and the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation Fund and the members of KQED.
#deeplook

Kidnapper Ants Steal Other Ants' Babies - And Brainwash Them | Deep Look

user45
15 vistas · 7 años hace

Kidnapper ants raid other ant species' colonies, abduct their young and take them back to their nest. When the enslaved babies grow up, the kidnappers trick them into serving their captors – hunting, cleaning the nest, even chewing up their food for them.

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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.

A miniature drama is playing out on the forest floor in California’s preeminent mountain range, the Sierra Nevada, at this time of year. As the sun sets, look closely and you might see a stream of red ants frantically climbing over leaves and rocks.

They aren’t looking for food. They’re looking for other ants. They’re kidnappers.

“It’s hard to know who you're rooting for in this situation,” says Kelsey Scheckel, a graduate student at UC Berkeley who studies kidnapper ants. “You're just excited to be a bystander.”

On this late summer afternoon, Scheckel stares intently over the landscape at the Sagehen Creek Field Station, part of the University of California’s Natural Reserve System, near Truckee, California.“The first thing we do is try to find a colony with two very different-looking species cohabitating,” Scheckel says.

“That type of coexistence is pretty rare. As soon as we find that, we can get excited.”

--- How do ants communicate?
Ants mostly use their sense of smell to learn about the world around themselves and to recognize nestmates from intruders. They don’t have noses. Instead, they use their antennae to sense chemicals on surfaces and in the air. Ants’ antennae are porous like a kitchen sponge allowing chemicals to enter and activate receptors inside. You will often see ants tap each other with their antennae. That behavior, called antennation, helps them recognize nestmates who will share the same chemical nest signature.

---Can ants bite or sting?
Many ants will use their mandibles, or jaws, to defend themselves but that typically just feels like a pinch. Some ants have a stinger at the end of their abdomen that can deliver a venomous sting. While the type of venom can vary across species, many ants’ sting contains formic acid which causes a burning sensation. Some have special glands containing acid that can spray at attackers causing burning and alarming odors.

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

https://www.kqed.org/science/1....947369/kidnapper-ant

---+ For more information:

Neil Tsutsui Lab of Evolution, Ecology and Behavior of Social Insects at the University of California, Berkeley
https://nature.berkeley.edu/tsutsuilab/

---+ Shoutout!

?Congratulations ?to the following fans for correctly naming and describing the inter-species, mandible-to-mandible ant behavior we showed on our Deep Look Community Tab… "trophallaxis:"

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Isha

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---+ About KQED

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

Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, which is also supported by the National Science Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Fuhs Family Foundation, Campaign 21 and the members of KQED.

‘Musical Melodies’

Nick Jr.
15 vistas · 8 años hace

Dora the Explorer and the Bubble Guppies have some fun songs all about music! Learn about different instruments, reasons to sing about anything, gymnastics, and painting! Sing-along and dance to these new songs, then make up a song of your own!

#DoraTheExplorer #BubbleGuppies #NickJr

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Juguemos en el Bosque + enganchado de los mejores videos musicales infantiles | El Reino infantil

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Juguemos en el bosque
Cuidado Con La Bomba
Chu chu ua chu chu ua
Yo soy tu gominola
Publicidad
Diez indiecitos
La chancha se fue a pasear
Una Vez Me Encontré
Hola amigo, juega conmigo
La Jirafa y el monito
Publicidad
Pie pie pie
Estatua
Soy, soy, soy, pelota de ping pong
Don Tomate
Tres Pececitos - Canciones Infantiles
Incy Wincy Araña

Las Figuras Mágicas - Plim Plim La Serie | El Reino infantil

user13
15 vistas · 8 años hace

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Los niños preparan un hermoso collage con figuras geométricas, ansiosa por terminar Mei-Li toma las figuras de sus amigos sin pedirlas y completa su obra. Pero los niños ya no tienen más figuras para seguir usando. Plim Plim los invita al Parque de las figuras mágicas donde divirtiéndose podrán aprender el valor de la amabilidad.

Las Figuras Mágicas - Plim Plim La Serie | El Reino infantil

Surprise Eggs Toys - Construction Vehicles for Kids | Bull Dozer, Road Roller & more | ChuChuTV

user14
15 vistas · 8 años hace

ChuChu TV Surprise eggs toy unboxing for learning Construction Vehicles. Make your kids learn how to build a house with different types of Construction vehicles like excavator, road roller, bulldozer, backhoe loader,wheel barrow,asphalt paver,trencher,concrete mixer,crane,dumptruck and more...

Subscribe to ChuChu TV Surprise Channel for more upcoming Surprise Eggs Learning Fun
https://www.youtube.com/channe....l/UCKcQ7Jo2VAGHiPMfD

ChuChu TV Police Chase Thief in Police Car Save Huge Birthday Egg Surprise Toys Gifts for Twin Kids
https://www.youtube.com/watch?v=WxJuZ5g_ZaA

Surprise Eggs Wildlife Toys | Learn Wild Animals & Animal Sounds - https://www.youtube.com/watch?v=rKk9uJqi4hY

Magical Surprise Eggs Ball Pit Show For Kids | Learn Colours & Shapes
https://www.youtube.com/watch?v=JXkTKnwCdMw

Chuchu TV Surprise Eggs Street Vehicles For Kids | Baby Vehicles, Public Transport Vehicles, Utility Vehicles & more
https://www.youtube.com/watch?v=XIf--aDHmpc

Chuchu TV Surprise Eggs Toys for kids to Learn Fruits & Vegetables
https://www.youtube.com/watch?v=eITDZ2AYCck

Chuchu TV Surprise Eggs Toys for Learning Numbers - Learn To Count 1 to 10
https://www.youtube.com/watch?v=DwvZJfF-Psw

Learn Baby Wild Animals & Animal Sounds | Chuchu TV Surprise for Kids
https://www.youtube.com/watch?v=aegTfHA1e48

Learn Baby Farm Animals & Animal Sounds | Chuchu TV Kids Surprise
https://www.youtube.com/watch?v=7FJBI5GUkaA

Learn Colours with Surprise Nesting Eggs Nursery Rhymes Toys - Chuchu TV Field Trip!
https://www.youtube.com/watch?v=OiTK24q5uD4

Christmas Surprise Eggs | Christmas Gifts & Decorations
https://www.youtube.com/watch?v=7vWHj_raLIg

Surprise Eggs Farm Animals Toys | Learn Farm Animals & Animal Sounds
https://www.youtube.com/watch?v=6RSpB3Glu_Q

Bedtime Stories for Kids in English - Snake & Parrots - Surprise Eggs Toys ChuChu TV Story Time

user14
15 vistas · 8 años hace

Here comes an new bed time story for your children which explains the universal moral "What You Sow Is What You Reap". Enjoy telling this story to your kids during bedtime.

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Surprise Eggs Wildlife Toys | Learn Wild Animals & Animal Sounds - https://www.youtube.com/watch?v=rKk9uJqi4hY

Magical Surprise Eggs Ball Pit Show For Kids | Learn Colours & Shapes
https://www.youtube.com/watch?v=JXkTKnwCdMw

Chuchu TV Surprise Eggs Street Vehicles For Kids | Baby Vehicles, Public Transport Vehicles, Utility Vehicles & more
https://www.youtube.com/watch?v=XIf--aDHmpc

Chuchu TV Surprise Eggs Toys for kids to Learn Fruits & Vegetables
https://www.youtube.com/watch?v=eITDZ2AYCck

Chuchu TV Surprise Eggs Toys for Learning Numbers - Learn To Count 1 to 10
https://www.youtube.com/watch?v=DwvZJfF-Psw

Learn Baby Wild Animals & Animal Sounds | Chuchu TV Surprise for Kids
https://www.youtube.com/watch?v=aegTfHA1e48

Learn Baby Farm Animals & Animal Sounds | Chuchu TV Kids Surprise
https://www.youtube.com/watch?v=7FJBI5GUkaA

Learn Colours with Surprise Nesting Eggs Nursery Rhymes Toys - Chuchu TV Field Trip!
https://www.youtube.com/watch?v=OiTK24q5uD4

Christmas Surprise Eggs | Christmas Gifts & Decorations
https://www.youtube.com/watch?v=7vWHj_raLIg

Surprise Eggs Farm Animals Toys | Learn Farm Animals & Animal Sounds
https://www.youtube.com/watch?v=6RSpB3Glu_Q

Cantan Los Animales - La Granja de Zenón 4 | La Granja de Zenón

user15
15 vistas · 8 años hace

A Bañarse en La Granja de Zenón - Grande y Pequeño | La Granja de Zenón

user15
15 vistas · 8 años hace

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A Bañarse en La Granja de Zenón - Grande y Pequeño | La Granja de Zenón

Las Historias de Om Nom - Una aventura inesperada - Cut The Rope Time Travel

user16
15 vistas · 8 años hace

¿Quieres saber cómo empezaron las insólitas aventuras de Om Nom? Mira este vídeo exclusivo y descubre cómo Om Nom conoce a sus nuevos amigos, ¡los Nommies!

CONSIGUE CUT THE ROPE
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Disfruta con los dibujos animados y caricaturas de Om Nom, el protagonista de la serie Cut The Rope, ¡que ya tiene su propia serie de dibujos! Suscríbete a Las Historias de Om Nom, y no te pierdas ningún capítulo de esta caricatura infantil tan adorable.