Unicorns may be mythical creatures, but they're very plausible-seeming ones. So why hasn't evolution gifted us with magical horses with horns? Let's take a look at the genetics and developmental biology of headgear in ruminants and other...

For people living in poverty, a guaranteed income can mean finally having the space to dream of a comfortable life. Sharing the stories of single moms who participated in a first-of-its-kind program that offered them $1,000 per month...

There’s a lot of confusion out there about what is and isn’t a dinosaur. And you’d be forgiven for being kinda confused. Maybe paleontologists are just messing with us. Or… maybe the question of what is and isn’t a dinosaur goes deeper...

You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. The surprisingly vicious debate over the planetary status of Pluto has given us a fascinating glimpse into what a scientific definition really is....

The human genome is 3.2 billion base pairs long and contains around 20,000 genes, but how much of that is garbage? Hosted by: Hank Green

Have you ever been forced to limit your identity to a single box on an application, survey or census questionnaire? For many, it is a futile and overall outdated exercise, especially for those with multiracial and multi-ethnic...

Paul Andersen explains the importance role of coupled reactions in biology. He starts by explaining how the power of a river can be harnessed by a water mill to grind grains. He describes the importance of ATP and how it is used within...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Physics and marketing don't seem to have much in common, but Dan Cobley is passionate about both. He brings these...

What exactly are fractals? A common misconception is that they are shapes which look exactly like themselves when you zoom in. In fact, the definition has something to do with the idea of "fractal dimension".

What exactly are fractals? A common misconception is that they are shapes which look exactly like themselves when you zoom in. In fact, the definition has something to do with the idea of "fractal dimension".

Today we start our unit on language with a discussion of meaning and how we assign and understand meaning. We’ll cover sense and reference, beetles in boxes, and language games. We’re also getting into the meaning-making game ourselves:...

Plenty of good things are done in the name of religion, and plenty of bad things too. But what is religion, exactly — is it good or bad, in and of itself? Philosopher Kwame Anthony Appiah offers a generous, surprising view.

When we define racism as behaviors instead of feelings, we can measure it -- and transform it from an impossible problem into a solvable one, says justice scientist Phillip Atiba Goff. In an actionable talk, he shares his work at the...

What if your attachment to being a "good" person is holding you back from actually becoming a better person? In this accessible talk, social psychologist Dolly Chugh explains the puzzling psychology of ethical behavior -- like why it's...

When you think of a brain, you probably imagine that pink, wrinkly organ in your skull, but we don’t have to stop there! Neither the brain’s functions, nor its cells, are confined to the organ we normally think of as the brain.

It turns out that defining what is and isn't a “tree” is way harder than it seems.

This week in SciShow News, there's a new kilogram in town, and we might be closer to understanding why people love coffee so much!

Astronomer Jean-Luc Margot has come up with a new definition for planets that may help us categorize worlds outside of the solar system, and we may have also discovered a new dwarf planet within the solar system!

A new study provides mathematical evidence that dark matter could be much older than we thought and we've found a weird glitch in a neutron star.

One could argue that slang words like ‘hangry,’ ‘defriend’ and ‘adorkable’ fill crucial meaning gaps in the English language, even if they don't appear in the dictionary. After all, who actually decides which words make it into those...

You might assume that the animated TV series "My Little Pony: Friendship Is Magic" is for little girls, but Bronies - adult men who sincerely LOVE the show, and aren't afraid to admit it - would differ. Many people are baffled, even...

Algae plus salt water equals ... fuel? At TEDxNASA@SiliconValley, Bilal Bomani reveals a self-sustaining ecosystem that produces biofuels -- without wasting arable land or fresh water.

When you're on opposite sides of an issue, how do you broker peace with your adversaries and work together to solve a problem? Follow along as animal rights activist Leah Garcés recounts three lessons she learned in hatching an ambitious...

This is the first-ever video of what we're calling the "hermit crab caterpillar"! We're pretty sure this strange caterpillar is a NEW SPECIES. We went to the Peruvian Amazon to see amazing things, but we never expected this :) But that...