Dong Woo Jang has an unusual after school hobby. Jang, who was 15 when he gave the talk, tells the story of how living in the concrete jungle of Seoul inspired him to build the perfect bow. Watch him demo one of his beautiful...

Hank talks about ancient sexy times, and how we know that early humans were getting it on with all kinds of folks.

Sunken relics, ghostly shipwrecks, and lost cities aren't just wonders found in fictional adventures. Beneath the ocean's surface, there are ruins where people once roamed and shipwrecks loaded with artifacts from another time. Peter...

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?

In our tech-driven, interconnected world, we've developed new ways and rules to court each other, but the fundamental principles of love have stayed the same, says anthropologist Helen Fisher. Our faster connections, she suggests, are...

Long ago, all stories belonged to Nyame, the all-seeing Sky God. But one creature, Anansi, was determined to bring the stories down to Earth. Anansi went to Nyame and requested to take ownership of the world's stories. The Sky God told...

This week we learned that the Neanderthal/Denisovan/Human family tree is pretty complicated, thanks to a close look into some Neanderthals' Y chromosomes.

This week on Crash Course Big History, Emily is talking about process of human evolution, and the knack for innovation that has allowed humans to become so dominant on the Earth. Human innovation, and the ability to build on those...

Not too long ago, our early human ancestors were under constant threat of attack from predators. And it turns out that this difficult chapter in our history may be responsible for the adaptations that allowed us to become so successful.

Part 1 of 3 in my series about why our bodies are shaped the way they are.

385 million years ago, a group of fish would undertake one of the most important journeys in the history of life and become the first vertebrates to live on dry ground. But first, they had to acquire the ability to breathe air.

Asking questions almost always leads to finding answers, but those answers will often pose even more questions. Here are five mysteries started and later solved by science.

Curious about genetics? Dig in a little deeper with this special SciShow Talk Show featuring science writer and 2016 Stephen Jay Gould prize winner Carl Zimmer talking about what he did after receiving himself on a hard drive.

In which John Green, Hank Green, and Emily Graslie teach you about evolution. So, in the last 3.8 billion years, life on Earth has evolved from single-celled prokaryotes to the dizzying array of life we have today. So how did all this...

Check out how cats became our favorite little murder machines.



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At age 16, journalist and filmmaker Jose Antonio Vargas found out he was in the United States illegally. Since then, he's been thinking deeply about immigration and what it means to be a US citizen -- whether it's by birth, law or...

Consider the claw. Frequently found on animals around the world, it's one of nature's most versatile tools. Bears use claws for digging as well as defense. An eagle's needle-like talons can pierce the skulls of their prey. Even the...

What if immortality wasn't just the stuff of epic comic book stories? Is it scientifically possible to be immortal? In this series, Joy Lin tackles six superpowers and reveals just how scientifically realistic they can be to us mere...

Why Do We Eat Spoiled Food

Every year, ocean levels rise and high tides flood the low-lying Marshall Islands in the Pacific, destroying homes, salinating water supplies and disrupting livelihoods. In a stirring poem and talk, youth climate warrior Selina Neirok...

The way we behave politically, socially, economically and ecologically isn't working, says community organizer and activist Tai Simpson. Sharing the creation myth of her Nez Perce tribe, she advocates for a return to the "old ways"...

Two sisters take the same DNA test. The results show that one sister is 10% French, the other 0%. Both sisters share the same two parents, and therefore the same set of ancestors. So how can one be 10% more French than the other? Tests...

Louise Leakey asks, "Who are we?" The question takes her to the Rift Valley in Eastern Africa, where she digs for the evolutionary origins of humankind -- and suggests a stunning new vision of our competing ancestors.

In part 3 of our special series on human ancestry, we investigate how closely related we all really are. Basic math tells us that all humans share ancestors. But you'll be amazed at how recently those shared ancestors lived. Thanks to...