Close

View full lesson: http://ed.ted.com/lessons/why-do-your-knuckles-pop-eleanor-nelsen

Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? Eleanor Nelsen gives the facts behind joint popping.

Lesson by Eleanor Nelsen, animation by Steve Belfer Creative.

YOU MAY LIKE
Loading...
A day in the life of a Roman soldier - Robert Garland

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/a-day-in-the-life-of-a-roman-soldier-robert-ga...

The science of spiciness - Rose Eveleth

View full lesson: http://ed.ted.com/lessons/the-science-of-spiciness-rose-eveleth When you take a bite of a hot pepper, your body reacts as if your m...

How we conquered the deadly smallpox virus - Simona Zompi

View full lesson: http://ed.ted.com/lessons/how-we-conquered-the-deadly-smallpox-virus-simona-zompi For 10,000 years, humanity suffered from the scou...

What happens when you remove the hippocampus? - Sam Kean

View full lesson: http://ed.ted.com/lessons/what-happens-when-you-remove-the-hippocampus-sam-kean When Henry Molaison (now widely known as H.M.) crac...

"Is Hypnosis Fake?" Hypnotist stuns TEDX crowd

Most people think hypnosis is some kind of trick. Religion calls it sinful. Science has questioned its very existence. Hypnotist, Laughologist and a...

How to unboil an egg - Eleanor Nelsen

View full lesson: http://ed.ted.com/lessons/how-to-unboil-an-egg-eleanor-nelsen It’s so obvious that it’s practically proverbial: you can’t unboil an...