Imagine you're fast asleep and then suddenly awake. You want to move but can't, as if someone is sitting on your chest. And you can't even scream! This is sleep paralysis, a creepy but common phenomenon caused by an overlap in REM sleep...

Before there was a rover named Perseverance, there was a series of missions that earned that name in their own right.

In this video Paul Andersen explains the wave-particle duality discovered by scientists. In certain situations particles (like electrons and photons) display wave like properties. This phenomenon can best be explored using the double...

What if we could diagnose some of the world's deadliest diseases by the smells our bodies give off? In a fascinating talk and live demo, biologist James Logan introduces Freya, a malaria-sniffing dog, to show how we can harness the...

Speaking as both an astronomer and "a concerned member of the human race," Sir Martin Rees examines our planet and its future from a cosmic perspective. He urges action to prevent dark consequences from our scientific and technological...

Hank explains how quasars and blazars are both the same thing - just oriented differently in respect to us - and how that impacts the way we perceive them and how it also effects the ways we can study them.

A very clever proof of Euler's characteristic formula using spanning trees.

Earth's atmosphere is big, but not as big as many people think. All the air that keeps us alive is just a thin candy shell around our planet. In this episode, echoing the words of John F. Kennedy, I'll show you the science of how we all...

12,000 years ago, the earth was very different, and so were some of the animals living on it! Here are 5 giants creatures you might have seen back then.

We all use our body on a daily basis, and yet few of us think about our physicality the way Wayne McGregor does. He demonstrates how a choreographer communicates ideas to an audience, working with two dancers to build phrases of dance,...

In this video Paul Andersen defines natural selection as differential reproductive success. He then explains how natural selection shapes organisms on our planet through variation and selection. A K-12 teaching progression is also...

Ric Elias had a front-row seat on Flight 1549, the plane that crash-landed in the Hudson River in New York in January 2009. What went through his mind as the doomed plane went down? At TED, he tells his story publicly for the first time.

Remote work, while redefining the workplace landscape, seems stuck behind endless video conference calls that hinder free-flowing conversation and collaboration. In the 21st century, is that really the best we can do? Digital...

Golan Levin, an artist and engineer, uses modern tools -- robotics, new software, cognitive research -- to make artworks that surprise and delight. Watch as sounds become shapes, bodies create paintings, and a curious eye looks back at...

The news of society's growing inequality makes all of us uneasy. But why? Dan Ariely reveals some new, surprising research on what we think is fair, as far as how wealth is distributed over societies ... then shows how it stacks up to...

Many of those with severe speech disorders use a computerized device to communicate. Yet they choose between only a few voice options. That's why Stephen Hawking has an American accent, and why many people end up with the same voice,...

In the pitch-black night, stung by jellyfish, choking on salt water, singing to herself, hallucinating … Diana Nyad just kept on swimming. And that's how she finally achieved her lifetime goal as an athlete: an extreme 100-mile swim from...

At TED2012, filmmaker Karen Bass shares some of the astonishing nature footage she's shot for the BBC and National Geographic -- including brand-new, previously unseen footage of the tube-lipped nectar bat, who feeds in a rather unusual...

Subtle motion happens around us all the time, including tiny vibrations caused by sound. New technology shows that we can pick up on these vibrations and actually re-create sound and conversations just from a video of a seemingly still...

America was built by makers -- curious, enthusiastic amateur inventors whose tinkering habit sparked whole new industries. At TED@MotorCity, MAKE magazine publisher Dale Dougherty says we're all makers at heart, and shows cool new tools...

You might want a really sturdy umbrella to dig into this video, because we’re discussing 5 animals that have a tendency to rain down from the sky and the reasons we think this might be happening!

Keith Bellows gleefully outlines the engineering marvels of the camel, a vital creature he calls "the SUV of the desert." Though he couldn't bring a live camel to TED, he gets his camera crew as close as humanly possible to a one-ton...

The universe is incredibly old, astoundingly vast and populated by trillions of planets -- so where are all the aliens? Astronomer Stephen Webb has an explanation: we're alone in the universe. In a mind-expanding talk, he spells out the...

Having trouble sleeping? In this episode of SciShow, Hank explores different kinds of sleep disorders, from insomnia to apnea to sleepwalking.

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