This guy, Phil Plait, gives an related talk about asteroids and how it's a really good idea to be thinking about them now, just in case one should come close to

This guy, Phil Plait, gives an related talk about asteroids and how it's a really good idea to be thinking about them now, just in case one should come close to hitting us and making us all extinct. Plus, he's a great speaker with a healthy dose of wit: http://www.ted.com/talks/phil_plait_how_to_defend_earth_from_asteroids.html http://www.ted.com/talks/phil_plait_how_to_defend_earth_from...