Why do we cry? It's weird. Humans leak water out of their faces when they get sad. Are we the only animals that do this? What does it mean? What is it for? Here's the science of human tears!

Mantis shrimp might as well be super heroes, and one of their powers might given us insight on how to spot cancer.

The ancestors of modern horses became so successful that they spread all over the world, to Europe, Asia, South America, and Africa. But in their native range of North America, they'll vanish for 10,000 years. Until another strange...

The toughest, most dominant canine gets the resources and respect - or at least that's the idea that caught on culturally. Turns out, that's not necessarily how it works.

Humans have been farming in the ocean for years, but we're not the only saltwater farmers out in the deep blue sea.

When you think "parasite," you might think of leeches or some nasty tape worm, but there are some that can live inside your very own cells. Chapters Plasmodium 0:56 Rickettsia 2:49 ROCKY MOUNTAIN SPOTTED FEVER 2:59 Legionella 4:09...

That baby is staring at you, and you don't know why. Something in your teeth? Did you accidentally leave a tag on your clothes? Don't worry,that baby probably just likes your face.

If you give them any thought at all, you probably associate them with sewers, cargo ships and maybe animated movies about animals that want to become French chefs. But for almost 200 years, tens of millions of rats have played a central...

Nowadays, we're pretty confident about how the dinosaurs died out, but there are still other extinctions throughout Earth's history, some big, some small, that remain unsolved.

Well, here we are. It's the final episode of Crash Course Film Criticism and we're going to chat about one of the more polarizing films ever made: Stanley Kubrick's 2001: A Space Odyssey. On the surface, 2001 tells the story of human...

Throughout history, people have been trying to figure out how our bodies work and how to fix them when things go wrong. This has led to some ideas that, with the benefit of hindsight, seem very strange

Humans have been taking psilocybin-containing mushrooms for centuries, but there has been recent research into the therapeutic possibilities of this molecule.

Humans are no longer valued for our creativity, says media theorist Douglas Rushkoff -- in a world dominated by digital technology, we're now just valued for our data. In a passionate talk, Rushkoff urges us to stop using technology to...

Do 97% of climate scientists really agree that humans are the main cause of climate change? Yep! Here's what the 97 percent statistic *really* means.

You should always wear sunscreen when you're playing outside, but you may have noticed that animals are outside all the time and they don't need sunscreen. Why?

Most animals with a backbone possess a tail, and they use them for all sorts of purposes. There isn’t just one reason for having a tail, it all depends on what the animal is adapted for.

Lots of kids are afraid of the dark, and some adults still can't stand sleeping in the complete darkness. But why are we afraid of it?

When people run around on a hot summer day, their sweat can help them cool off! But dogs can't sweat, and they have big, furry coats! So what can they do to stay cool?!

An amazing new technology will let scientists grow new kidneys for patients using their own stem cells inside of pigs.

Plants are finding their ways into caves, and it's all our fault.

In the grand scheme of history, modern reality is a bizarre exception when compared to the worlds of ancient, precolonial and Indigenous civilizations, where myths ruled and gods roamed, says historian Greg Anderson. So why do Westerners...

When radium was first discovered, its luminous green color inspired people to add it into beauty products and jewelry. It wasn't until much later that we realized that radium's harmful effects outweighed its visual benefits....

Learn how some animals have adapted to survive in some of the hottest and driest environments in the world, by covering themselves in mucus and calling it good.

Today we’re going to talk about how computers understand speech and speak themselves. As computers play an increasing role in our daily lives there has been an growing demand for voice user interfaces, but speech is also terribly...