How to defend Earth from asteroids 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 enthralls the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them. (Recorded at TEDxBoulder 2011, September 2011, in Boulder, Colorado. Duration: 14:16.)

[ted id=1280]

Watch Phil Plait’s talk on, where you can download it, rate it, comment on it and find other talks and performances from our archive of 1,000+ TEDTalks.