English is a confusing language for many reasons. But the irregular verbs might be the most confusing part. Why is "told" the past tense of "tell" but "smold" isn't the past tense of "smell"? It turns out that the study of irregular...

A huge and diverse subfamily of dogs, the bone-crushers patrolled North America for more than thirty million years, before they disappeared in the not-too-distant past. So what happened to the biggest dogs that ever lived?

Eating disorders are very serious psychological conditions<br/>
that can also be very dangerous - and they are much more common than you think.

Genetic tests can give you advice about what lifestyle, diet, and level of exercise are best for you. But you should take those suggestions with a grain of salt, because, when it comes to our bodies, our genes aren’t so much an open...

Illness is complicated, and today we take a look at new research that points to two diseases, anorexia and dementia, that both may be more related to genetics and behavior than we previously thought.

Human cannibalism is a lot more common than you might think. Dive into its complex history and see its uses in medicine, cultural rituals and in times of survival. -- 15th century Europeans believed they had hit upon a miracle cure: a...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. In an emotionally charged talk, MacArthur-winning activist Majora Carter details her fight for environmental...

Steroids. They've caused global scandals. They're banned in most athletic competitions. Yet the same properties that help elite athletes and bodybuilders improve performance also make steroids valuable for treating many illnesses and...

All humans share some common bits of DNA, passed down to us from our African ancestors. Geneticist Spencer Wells talks about how his Genographic Project will use this shared DNA to figure out how we are -- in all our diversity -- truly...

You’ve heard that dogs are basically furry toddlers, with cognitive abilities on par with a 2 year old human. But while that might make sense on some levels, the minds of distinct species can work very differently.

Even science can't yet explain these 7 extremely cool, weird phenomena in the universe, despite decades or even centuries of research.

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pters
BALL
LIGHTNI
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> 3:07r/> SON
IC BOOM
...

You've probably been told at some point or another to "trust your gut", but is that actually good advice?

What if we could build a global waste disposal service for carbon? In this forward-thinking talk, carbon capture advisor Bas Sudmeijer proposes building CO2 networks: partnerships between cities around the world that would share the cost...

In November 1986, Australian miners climbed Lunatic Hill and bored 20 meters into the Earth. They were rewarded with a fist-sized, record breaking gemstone, which they named the Hailey's Comet opal. Thanks to a characteristic called...

You might have heard about repressed memories on TV, but those memories aren’t always what they seem. <br/>
*Content Warning: description of school shooting

If you've never had a migraine, you might think it's just a really bad headache. But if you've ever had them, or you know someone who does, you know that they're much worse -- and much more complicated -- than that. Hank explains the...

Why do we love people we're related to? Compared to strangers, why do we feel such a deep sense of connection with our family members? Sure, they're nice to us, we take care of each other, and we often live with them, but there has to be...

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?

This is an absolutely beautiful piece of math. It shows how certain ideas from topology, such as the mobius strip, can be used to solve a slightly softer form of an unsolved problem in geometry.

This is an absolutely beautiful piece of math. It shows how certain ideas from topology, such as the mobius strip, can be used to solve a slightly softer form of an unsolved problem in geometry.

If you've never had a migraine, you might think it's just a really bad headache. But if you've ever had them, or you know someone who does, you know that they're much worse -- and much more complicated -- than that. Hank explains the...

A plane fueled only by the sun is flying around the world and a certain cancer in shellfish is contagious! Olivia Gordon explains these stories in this week's SciShow News.

What has tough skin, a tiny tail, and a big horn on its nose? A rhino! Join Jessi and Squeaks and learn all about these super cool, super strong animals!

When you poop sugar, clone yourself and give birth to pregnant babies, you know your survival skills are off the hook...and that you must be an aphid.