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...
The amazing ways plants defend themselves - Valentin Hammoudi

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-amazing-ways-plants-defend-themselves-vale...

What happens during a heart attack? - Krishna Sudhir

View full lesson: http://ed.ted.com/lessons/what-happens-during-a-heart-attack-krishna-sudhir Approximately seven million people around the world die...

Why are some people left-handed? - Daniel M. Abrams

View full lesson: http://ed.ted.com/lessons/why-are-some-people-left-handed-daniel-m-abrams Today, about one-tenth of the world’s population are sout...

At what moment are you dead? - Randall Hayes

View full lesson: http://ed.ted.com/lessons/at-what-moment-are-you-dead-randall-hayes For as far back as we can trace our existence, humans have been...

Why do blood types matter? - Natalie S. Hodge

View full lesson: http://ed.ted.com/lessons/why-do-blood-types-matter-natalie-s-hodge It’s often said that despite humanity’s many conflicts, we all ...

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...