Squeaks and Jessi are learning all about the animals that live at the bottom of the world, including penguins - emperor penguins, macaroni penguins, and more! We learn why penguins look like they're all dressed up, and what kind of food...

Have you ever longed to swim while wielding a longer snorkel? Well, there are a few reasons why they might be shorter than you'd like.

Winter means a lot of changes, and while you might think it's cold outside, some animals can't wait for it to get colder so that they have an easier time finding their next meal!

Today, penguins are found mainly in the Southern Hemisphere. But fossils have revealed giant lookalikes to these swimming birds further up north, spurring questions of how they evolved and what happened to them.

When the ancestor of cetaceans went back into the water some 50 million years ago, it left a few things behind—including the functioning of certain genes that seem like they’d be hard to live without.

If you’ve been to a sporting event with a large number of people, you’ve likely seen, or even been a part of, “the wave.” But did you know that there are little fishies who do a version of the wave not for fun, but for survival?

Lice don’t just thrive in the biomes of body hair and fur, they can also live in a place that seems like it should be bug-free: the oceans.

After he swam the North Pole, Lewis Pugh vowed never to take another cold-water dip. Then he heard of Lake Imja in the Himalayas, created by recent glacial melting, and Lake Pumori, a body of water at an altitude of 5300 m on Everest --...

You botched your forward double somersault and biffed it hard on the water. Why does it have to hurt so bad?

Blaise Aguera y Arcas leads a dazzling demo of Photosynth, software that could transform the way we look at digital images. Using still photos culled from the Web, Photosynth builds breathtaking dreamscapes and lets us navigate them.

In the deep, dark ocean, many sea creatures make their own light for hunting, mating and self-defense. Bioluminescence expert Edith Widder was one of the first to film this glimmering world. At TED2011, she brings some of her glowing...

It's Green vs. Green in this week's quiz show as Hank battles Katherine to see who takes home all the marriage points.

Last week we went up up up a mountain. Well, today we're going down down down into the ocean to see what habitats await us there. Yep, the ocean has layers and the types of things we encounter there change the deeper we go.

Strapped to a jet-powered wing, Yves Rossy is the Jetman -- flying free, his body as the rudder, above the Swiss Alps and the Grand Canyon. After a powerful short film shows how it works, Rossy takes the TEDGlobal stage to share the...

What do you want to be when you grow up? Well, if you're not sure you want to do just one thing for the rest of your life, you're not alone. In this illuminating talk, writer and artist Emilie Wapnick describes the kind of people she...

You might be familiar with the phrase "like water off a ducks back". But it's not that ducks don't get wet, it's that they get wet, with style.

Humans can’t go too far above or below sea level unaided, but there are some complex forms of life that CAN survive at super high elevations or in the deepest parts of the ocean.

Aboard Mission Blue, scientist Greg Stone tells the story of how he helped the Republic of Kiribati to create an enormous protected area in the middle of the Pacific -- protecting fish, sealife and perhaps the island nation itself.

"The bends" is one of the biggest risks that humans have to deal with when diving, but why don't marine animals, which are diving all the time, get them?

How is it possible for air-breathing marine mammals like sperm whales and elephant seals to hold their breath for so long?

Jessi and Squeaks got a question about how submarines go underwater and explore, so Squeaks did some research!

This video provides an introduction to Node.js.

We’re Going on a Bear Hunt – How to Beatbox with SK Shlomo

In this wild adventure, Mark relives diving in Indonesia in search of the Wonderpus, one of the rarest octopuses in the world and possibly one of the smartest?!