Species that no longer exist vastly outnumber those that currently populate the planet, but occasionally we rediscover a species we thought was extinct!

They're the second-largest fish in the world, they're almost extinct, and we know almost nothing about them. In this talk, Simon Berrow describes the fascinating basking shark ("great fish of the sun" in Irish), and the exceptional --...

Paul Andersen reviews the major within the first unit on natural selection. He starts by defining evolution and explaining how evolution can occur in a population. He reviews the population genetics and camouflage lab. He reviews...

Hawaii's Kilauea volcano suddenly erupted last week. It's happened before, so why are eruptions so hard for scientists to predict?

Danish architect Bjarke Ingels rockets through photo/video-mingled stories of his eco-flashy designs. His buildings not only look like nature -- they act like nature: blocking the wind, collecting solar energy -- and creating stunning...

Although they don’t seem like the talkative type, recent research suggests that bird eggs can use vibrations to relay warnings about the outside world to their nest-mates.

Hercules, the strongest man alive with a mighty heart to match. Orpheus, charmer of nature and master of music. Castor and Pollux, the twin tricksters. The Boreads, sons of the North Wind who could hurtle through the air. Brought...

Underwater filmmaker Mike deGruy has spent decades looking intimately at the ocean. A consummate storyteller, he takes the stage at Mission Blue to share his awe and excitement -- and his fears -- about the blue heart of our planet.

It's been said that when an elder dies, it's as if a library is burned. Anthropologist Elizabeth Lindsey, a National Geographic Fellow, collects the deep cultural knowledge passed down as stories and lore.

Many cat owners are familiar with the "gifts" their feline friends are fond of giving, but if left unchecked, this behavior can be devastating.

When you think of a caterpillar, you probably picture a cute, chubby little critter, chewing on leaves and dreaming of becoming a butterfly. But the whip-fast, razor clawed Hawaiian inchworm is here to challenge those stereotypes.

Game designer David Perry says tomorrow's videogames will be more than mere fun to the next generation of gamers. They'll be lush, complex, emotional experiences -- more involving and meaningful to some than real life. With an excerpt...

Science fiction writer Monica Byrne imagines rich worlds populated with characters who defy our racial, social and gender stereotypes. In this performance, Byrne appears as a hologram named Pilar, transmitting a story of love and loss...

Looking back over his long career, architect Moshe Safdie delves into four of his design projects and explains how he labored to make each one truly unique for its site and its users.

If you take a look at a map of Scotland, you'll notice an eerily straight line running through the highlands, this is the Great Glen Fault the product of half a billion years of time and geology.

We’re beginning our engineering journey with a tour through the major branches. Today Shini explains the facets of civil engineering, including structural and construction engineering, city planning, transportation, and sanitation.

The best evidence we have suggests that, while Caviomorpha originated in South America, they came from ancestors in Africa, over 40 million years ago. So how did they get there?

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.

We're not doing frontline exploratory science in a huge portion of the world -- the places governments deem too hostile or disputed. What might we be missing because we're not looking? In this fearless, unexpectedly funny talk,...

Some animal species are found in almost every corner of the world. But these 8 species are impressively isolated.

Do you give ancient Egypt credit for the domestication of cats? That's what many people think! But, with some new evidence, it seems that cats became our cuddly counterparts a little further east and because of an emerging pest problem.

The Socotra archipelago in the Arabian Sea supports so many diverse and unique species that it has been described as the most alien place on Earth. Hank takes you on a tour of this weird place in this episode of SciShow.

In the early 1900s, archaeologist Sir Arthur Evans uncovered nearly 3,000 tablets inscribed with strange symbols. He thought the script, dubbed Linear B, represented the Minoan language, while others came up with their own theories. Was...

Sometimes, a species has declined so dramatically that they require serious human intervention to ensure they don’t disappear forever. Here are six ways we’re using conservation and science to keep those species alive....

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