In your brain the right side controls the left half of your body and vice versa. We still aren't sure why this is, but some scientists have come up with a pretty bizarre explanation: that some ancient vertebrate ancestor was born with...

Octopuses are smart! They play with toys, pull off daring escapes, and are masters of disguise. But they're also smart in a lot of ways that the human mind probably can't comprehend. For example, they basically have independent brains in...

SciShow debunks the myth that you only use 10 percent of your brain. So, how much do you really use? And how do we know?

In which Mike Rugnetta continues to teach you about tricksters. In this episode, we're talking about tricksters as culture heroes. Basically, a culture hero is someone whose creativity adds to their mythological culture. We'll learn how...

The Bone Wars resulted in the description of some of the most famous dinosaurs we know of today, but not without some pretty big mistakes.

Hank and Phil Plait dive deep into questions about gametes and sea mammals in this episode of SciShow Quiz Show!

Can't wait to get into outer space? Well there's a bit you need to know first... Spending time in zero gravity can have some pretty extreme effects on the human body. Still scientists are already making plans for long trips to other...

Today we're going to talk about LARPs or live action role-playing games. Larping tends to conjure up the image of a bunch of nerds hitting each other with foam weapons but it's much more than that. LARPs merge performance, community, and...

Another aging rock star, another baby, does age have any affect on sperm, or are these little swimmers seemingly viable until death?

When you were a kid, one of your friends probably told you that if you sneezed with your eyes open, your eyeballs would pop out of your head. But that can't really happen... right?

Is it okay if I totally trash your office? It's a question elyn Saks once asked her doctor, and it wasn't a joke. A legal scholar, in 2007 Saks came forward with her own story of schizophrenia, controlled by drugs and therapy but...

There's no question that a dog tilting its head is one of the cutest things possible, but why do they do it?

Big-brained scientists have found the mechanism that may have allowed their brains (and all humans') to get so big.

One team of researchers may has found a promising lead in the fight to cure or prevent Alzheimer's. And another team is helping us understand how Hydras regrow their heads.

Having feelings isn't a sign of weakness -- they mean we're human, says producer and activist Nikki Webber Allen. Even after being diagnosed with anxiety and depression, Webber Allen felt too ashamed to tell anybody, keeping her...

In this factual talk, geneticist Wendy Chung shares what we know about autism spectrum disorder — for example, that autism has multiple, perhaps interlocking, causes. Looking beyond the worry and concern that can surround a diagnosis,...

Do you ever talk to your dog? Do they ever talk back? Humans and dogs have a truly amazing relationship, developed along an evolutionary journey that goes back nearly 10,000 years. Do they really understand what we say, think, and feel?...

Dogs do a lot of weird things, and sometimes they're funny enough to post on Tumblr. But before you do, make sure li'l Scamp isn't doing any of these three things -- because they spell trouble.

Hank introduces us to that great mathematical mind, Alan Turing, who, as an openly gay man in the early 20th century faced brutal prejudice that eventually led to his suicide, despite being a genius war hero who helped the Allies defeat...

When Julius Maada Bio first seized political power in Sierra Leone in 1996, he did so to improve the lives of its citizens. But he soon realized that for democracy to flourish, its foundation needs to be built on the will of the people....

If you're old enough to drink, you may have had a few too many cocktails and suddenly everything is spinning. Strange as it might seem, that’s not because the alcohol you drank is messing with your brain! So what causes the spins?

Some kids learn by listening; others learn by doing. Geoff Mulgan gives a short introduction to the Studio School, a new kind of school in the UK where small teams of kids learn by working on projects that are, as Mulgan puts it, "for...

Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship, and to discover how those processes...

As the sun rises in 55 BCE, Camma lays two pigeons on the altar at the center of her village. She wrings the birds' necks and cuts them open to examine their entrails for divine messages. Camma is a druid. She conducts religious rites,...