Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on May 30, 2019
If you've ever been part of a huge crowd, like at a sporting event, you've probably seen people clap, sing, and chant together in sync. How do big groups of individuals all manage to do the same thing at the same time, even when there's no one leading them? Well, it turns out, they kind of can't help it!
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at https://www.scishowtangents.org ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: