Meet the microscopic arachnids that live on your face, and find out why Demodex mites are part of the human microbiome.

Explore the science of the phenomenon of “floaters,” those tiny blobs that swim across your field of vision.

A discovery in the dark depths of the Pacific Ocean is challenging the scientific consensus of how oxygen is produced and has even called into question how life on Earth began.

Today, about one-tenth of the world’s population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insi...

What’s a human? And how did we become humans, anyway? In this episode of Crash Course Biology, we’ll meet some of our closest relatives and trace how we evolved into the brainy, inventive, complex species we are today.

Deep in the Pacific Ocean lies a chain of islands cut off from the rest of the world. Here life from all across the world has come to establish itself, only to find an environment unlike any other the Earth has to offer.

There are some waves that you really don’t ever want to encounter when you’re swimming in the ocean. Square waves look like a giant chess board over the ocean. It's pretty awesome but incredibly dangerous.

When you look at the seas and oceans on the map you might think that they just flow into each other. It seems like there’s only one big ocean, and people just gave different names to its parts. Well, you’ll be amazed at how vivid the borders between them...