Got a YouTube account?

New: enable viewer-created translations and captions on your YouTube channel!

How to defend Earth from asteroids

Get Embed Code
37 Languages

Speaker: Phil Plait

What's six miles wide and can end civilization in an instant? An asteroid -- and there are lots of them out there. With humor and great visuals, Phil Plait shows us all the ways asteroids can kill us (yipes), and what we must do to avoid them.