Claws, teeth, stingers... there are a lot of things that can make an animal look downright scary and dangerous. Sometimes, though, looks can be deceiving! Face your fears and learn about eight animals that use their tough looks to hide the fact that they're basically harmless.

In freezing cold sand, a burning hot mine, or even inside solid rock – these extremophiles live anywhere that you wouldn’t want to live. What are they? How can they live in such extreme places?In freezing cold sand, a burning hot mine, or even inside solid rock – these extremophiles live anywhere that you wouldn’t want to live. What are they? How can they live in such extreme places?

Humans aren’t the only creatures that get frustrated. Squirrels do too. One researcher wants to know, could there be an evolutionary benefit to losing your cool?

Humans should urinate at least four to six times a day, but occasionally, the pressures of modern life force us to clench and hold it in. How bad is this habit, and how long can our bodies withstand it? Heba Shaheed takes us inside the bladder to find out.

When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can we avoid them? Mel Rosenberg takes us inside our teeth to find out.

Sometimes, it makes sense for critters across the animal kingdom to chow down on their own young.

Check out nine abundant animals that help support the food chain in their ecosystems!

The Ottoman Empire used to be one of the world's largest empires. So how did this mighty empire meet its demise?

Light, bright, and cheerful, "The Four Seasons" by Antonio Vivaldi is some of the most familiar of all early 18th century music, featured in numerous films and television commercials. But what is its significance, and why does it sound that way? Betsy Schwarm uncovers the underlying narrative of this musical masterpiece.

Few individuals have influenced the world and many of today’s thinkers like Plato. He created the first Western university and was teacher to Ancient Greece’s greatest minds, including Aristotle. But even he wasn’t perfect. Along with his great ideas, Plato had a few that haven’t exactly stood the test of time. Wisecrack gives a brief rundown of a few of Plato’s best and worst ideas.

What rights do people have, and where do they come from? Who gets to make decisions for others, and on what authority? And how can we organize society to meet people’s needs? Tom Mullaney shows how these questions challenged an entire nation during the upheaval of the French Revolution.

Paper cuts are tiny compared to other injuries you may have experienced, but they hurt… A LOT! This has to do with your hands being pretty sensitive, and the fact that the edges of paper are like tiny saws.

Published on Nov 6, 2016 We've already learned a lot about the solar system, but sometimes the most fascinating things are what we DON'T know.

Published on Nov 14, 2016 There's a method to the madness of classifying roads. Take a ride with Phil Edwards, as he explains the naming conventions behind roads. A street is a road but a road isn't always a street. A road can also be an avenue or a boulevard—it's the general term for anything that connects two points. From there, the names of roads can be shaped by their environment and/or the form of the road. A drive is a long winding road that can be shaped by mountains or a lake. Place is a narrow road with no throughway. And just as there is no rule book to building a city, these roads and other don't always correspond with thei

Reality isn't something you perceive; it's something you create in your mind. Isaac Lidsky learned this profound lesson firsthand, when unexpected life circumstances yielded valuable insights. In this introspective, personal talk, he challenges us to let go of excuses, assumptions and fears, and accept the awesome responsibility of being the creators of our own reality.

SciShow welcomes back Diana Six to talk to us about current news on the Mountain Pine Beetle Outbreak. Then, Jessi Knudsen Castañeda stops by and brings a familiar friend whose anatomy may help scientists develop better hypodermic needles. Published on Jan 11, 2017 · 35 minutes ago

Published on Jan 26, 2017 · 1 hour ago The way light behaves can seem very counter intuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know that light exists as a wave and why that's really cool!