How to defend Earth from asteroids

Name: How to defend Earth from asteroids
Uploaded: 2011-11-21T15:57:42Z
Duration: 13 min 59 s
Description: 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.

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Phil Plait |

TEDxBoulder 2011

• September 2011

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.