A skyrocketing demand for food means that agriculture has become the largest driver of climate change, biodiversity loss and environmental destruction. Jonathan Foley shows why we desperately need to begin "terraculture" -- farming for...

Five billion people can't use the internet. Aleph Molinari empowers digitally excluded people, by giving them access to computers and sharing the know-how to use them.

Career analyst Dan Pink examines the puzzle of motivation, starting with a fact that social scientists know but most managers don't: Traditional rewards aren't always as effective as we think. Listen for illuminating stories -- and...

The story of sloths is one of astounding ecological variability, with some foraging in the seas, others living underground, and others still hiding from predators in towering cliffs. So why are their only living relatives in the trees?

Even though there are no volcanoes on the Olympic Peninsula, you can find lots of volcanic rocks on the beaches. This bizarre circumstance might have to do with how the ancient island transformed Washington state.

Welcome back to SciShow Talk Show where Hank talks with Dr. Jeff Good about seasonal animal adaptations. Special guest Jessi Knudsen Castañeda with Cas the Arctic Fox.

Modern technology can make us forget how cruel the ocean once was to seafarers. Even with these new technologies, some parts of the sea are still just plain dangerous. Here are a few places on Earth where ships have met the briny depths.

Smilodon was a fearsome Ice Age cat, the size of a modern-day tiger, that had a pair of fangs nearly 18 centimeters long. But it was only the last and largest of the great sabertooths: ridiculously long canines had already been a trend...

Over the past few centuries, Western cultures have been very good at creating general prosperity for themselves. Historian Niall Ferguson asks: Why the West, and less so the rest? He suggests half a dozen big ideas from Western culture...

Hank gives us a summary of a strange new calculation, which estimates the total body mass of all the humans on earth.

Between 1840 and 1914, an estimated 40 million people left Europe. This is one of the most significant migrations in human history. So, who was leaving Europe? And why? Crash Course is on Patreon! You can support us directly by signing...

These little fliers may be small, but pound for pound, they go farther than just about anyone else.

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It sure seems like some plants really don't want you hiking through their woods, but maybe your immune system is just overreacting.

Prehistoric teeth prove that hyenas once roamed the Arctic and the relationship between ancient crocodiles and climate is more complicated than we thought.

Are the simplest phones the smartest? While the rest of the world is updating statuses and playing games on smartphones, Africa is developing useful SMS-based solutions to everyday needs, says journalist Toby Shapshak. In this...

Our lives depend on curbing climate change, but so many priorities seem to be in competition. What's the most urgent thing humanity can do right now? Social entrepreneur James Irungu Mwangi tells us why Africa could be the ideal home for...

Tuna are ocean athletes -- fast, far-ranging predators whose habits we're just beginning to understand. Marine biologist Barbara Block fits tuna with tracking tags (complete with transponders) that record unprecedented amounts of data...

Reindeer meat could’ve entered North American cuisine and culture, but our turn of the century efforts to develop a reindeer industry were stymied by nature, the beef lobby, and the...

This week, an update on Dawn's rendezvous with Ceres, a changing of the guard on the ISS, and a viewer's guide to this year's solar eclipse!

Locusts are a huge agricultural pest...except in North America. What happened to the Rocky Mountain locusts that once swarmed this continent? Researchers think that the colonization of the North American West might have had something...

Hank briefs us on the upcoming planetary transit of Venus, which will be observable June 5th and 6th of 2012.

Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been...

There’s a common misconception that humans of the past lived in harmony with their environments and left them “pristine and untouched.” However, there is plenty of evidence that these relationships were much more complicated

How can we measure what makes a school system work? Andreas Schleicher walks us through the PISA test, a global measurement that ranks countries against one another -- then uses that same data to help schools improve. Watch to find out...