Jessi and Squeaks introduce you to the amazing, unusual animals and plants from a place like nowhere else on earth: Madagascar!

Hoboro Island off the coast of Japan may soon be an island of the past, and it’s primarily due to one unsuspecting isopod.

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

Imagine going about your life knowing that, at any given moment, you and everyone you know could be wiped out without warning at the push of a button. This was the reality for millions of people during the forty-five year period after...

The royal couple of Haiti rode into their coronation to thunderous applause. After receiving his ornate crown, Henry Christophe ascended his throne, towering 20 meters in the air. But little did the cheering onlookers know that the first...

Hank talks about population genetics, which helps to explain the evolution of populations over time by combing the principles of Mendel and Darwin, and by means of the Hardy-Weinberg equation.

To find the path to long life and health, Dan Buettner and team study the world's "Blue Zones," communities whose elders live with vim and vigor to record-setting age. In his talk, he shares the 9 common diet and lifestyle habits that...

Paul Andersen explains how disruptions in homeostasis can affect biological systems at all levels. He uses the example of dehydration in animals to explain how disruptions at the cellular level can affect an organism. He also uses the...

This video is about how causal models (which use causal networks) allow us to infer causation from correlation, proving the common refrain not entirely accurate: statistics CAN be used to prove causality! Including:...

One hundred green-eyed logicians have been imprisoned on an island by a mad dictator. Their only hope for freedom lies in the answer to one famously difficult logic puzzle. Can you solve it? Alex Gendler walks us through this green-eyed...

Ideas like liberty, freedom, and self-determination were hot stuff in the late 18th century, as evidenced by our recent revolutionary videos. Although freedom was breaking out all over, many of the societies that were touting these ideas...

Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization.

You'd have a hard time finding the medieval city K_nigsberg on any modern maps, but one particular quirk in its geography has made it one of the most famous cities in mathematics. Dan Van der Vieren explains how grappling with...

After witnessing the atrocities of his fellow man in World War II, William Golding was losing his faith in humanity. Later, during the Cold War, as superpowers began threatening one another with nuclear annihilation, he was forced to...

Thanks to The National Trust for Historic Preservation, in partnership with American Express, for sponsoring this video celebrating 100 years of the National Park Service! Now through July 5th, you can help your favorite park win an...

If you think scientists lead boring, monotonous lives, you must not know about Tycho Brahe. The 16th century astronomer who accurately predicted planetary motion led quite a dramatic life -- complete with a kidnapping, a sword duel and...

Null Island - The Busiest Place That Doesn't Exist

Island and coastal nations need to protect their waters to keep the oceans healthy. But they often have lots of debt and aren't able to prioritize ocean conservation over other needs. Mark Tercek and his team at The Nature Conservancy...

Until the early 20th century, Tasmania was home to a very weird wolf-like creature. Except that it wasn't a wolf. Even though it looked like a wolf. How did that happen? Here's the science of convergent evolution!

New ReviewTheseus journeys to Crete to fight the Minotaur in the Labyrinth and save his people.

New ReviewExplore some of the planet’s most extraordinary islands — from Bishop Rock, the world’s smallest island with a building that once housed lighthouse keepers, to the cat-filled paradise of Tashirojima, where furry friends outnumber people.

New ReviewThe Uros Islands on Lake Titicaca are unique, human-made floating islets crafted from water-resistant totora reeds. Constantly maintained as the reeds rot every few weeks, they’re anchored with eucalyptus poles to withstand the lake’s...

New ReviewKnown as the “Hawaii of Japan,” Okinawa is a subtropical archipelago of over 160 islands where people live remarkably long lives. With warm winters, inviting seas, and a diet rich in tofu, yam, and seaweed, locals thrive in both health...

Why does Donald Trump want to acquire Greenland?