How to defend Earth from asteroids

Title:
How to defend Earth from asteroids
Speaker:
Phil Plait
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 enthralls the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them.

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Video Language:
English
Team:
closed TED
Project:
TEDTalks
Duration:
13:56