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How to defend Earth from asteroids

TEDxBoulder 2011 · 14:16 · Filmed Sep 2011
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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. (Filmed at TEDxBoulder.)

pin This talk was presented to a local audience at TEDxBoulder 2011, an independent event. TED editors featured it among our selections on the home page.
Astronomer
Phil Plait blogs at Bad Astronomy, where he deconstructs misconceptions and explores the wonder of the universe. Full bio

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