Have you ever wondered if there is anyone (or anything) else out there in the universe? Well, you're not alone. But what would alien life look like? And what would their food chains and food webs look like? In this episode of Crash...

Political scientist Don Green joins Joe to figure out the complex psychological and social factors that motivate us to vote - or not to. They discuss how and why this decision making process may be in conflict with certain scientific...

For centuries, diamonds were one of the most mysterious materials on Earth. They were beautiful, indestructible, and completely unexplained. Today, we’re exploring how scientists unlocked their secrets, and how one lab recreates the...

From steam engines, to contact lenses, to biometric security based on someone's voice, there are a lot of inventions out there that are older than you think.<b<br/>r/>

Hosted by: Hank Green (he/him)

Today's experts often overwhelm parents and guardians with alarming warnings of treacherous roads ahead for their children, sometimes turning dedication into anxiety and obsessiveness. Instead of chasing trends, psychiatrist Mathilde H....

Ragnarok has been raging for far too long; many gods and heroes have fallen, and the rest can barely stand. Loki, his bright eyes dimmed by exhaustion, asks to meet. He proposes that you and he settle the conflict with a game atop a...

In 1952, polio was everywhere: killing or paralyzing roughly half a million people annually. Yet just 10 years later, paralytic polio cases in the US dropped by 96% and we were on track to get rid of polio for good. But in recent years,...

We tend to consider romantic partners and family ties to be our most important relationships, but deep friendships can be just as meaningful. In a perspective-shifting talk, author Rhaina Cohen introduces us to the people unsettling...

TOP 10 REASONS Why We Know the Earth is Round

The Counterintuitive Physics of Turning a Bike

Do We Have to Get Old and Die?

We’ve changed - and standardized - the way diseases get named because the old way was often stigmatizing and confusing.

This video is about the famous 'Twins paradox' of special relativity, how time can appear to be faster for two different observers at the same time, and which twin really is older (or younger) - the one who stays on earth or the one who...

Still wondering why leaves are green and not purple or even black? CHLOROPHYLL! It's how leaves work.

Plate Tectonics Explained

This video is about the differences between the corpses or final degenerate dense star forms that dead stars take: black holes, neutron stars, and white dwarfs. The main distinguishing features between them are the mass cutoffs...

Typically, with any piece of technology, you pump one unit of energy in and you get about one out. That’s just the first law of thermodynamics: energy has to be conserved. But there’s a piece of technology called a heat pump, where for...

Can AI help catch oceanic outlaws? From drug smugglers to modern-day pirates, maritime crime fighter Dyhia Belhabib introduces Heva: an AI-powered tool that aggregates international criminal records to detect and stop crime that might...

In the beginning of the universe, all was darkness — until the first organisms developed sight, which ushered in an explosion of life, learning and progress. AI pioneer Fei-Fei Li says a similar moment is about to happen for computers...

We're all used to our bodies being more or less the color they always are. But there are a few different medical reason you may be seeing rainbow in the mirror, from benign to medically concerning. Here's just some of the reasons that...

What happens when architecture meets empathy? Through the challenges of the Russian invasion of Ukraine, architect and humanitarian Slava Balbek, who volunteers part-time on the front lines, highlights the importance of designing for...

Theater has the power to transform the most pressing issues of our time from news stories into human stories, says director and playwright Amir Nizar Zuabi. Recounting his work on the journey of Little Amal — a 13-foot puppet symbolizing...

Learn the about the physics that allows bikes to stay upright and in motion, even without a rider.

Cancer is a complicated disease, and there's no simple blood test for early detection and screening to spot cancer in general. That might be changing thanks to LINE-1, a retrotransposon gene that doesn't do anything.