How to defend earth from Asteroids – Phil Plait

Phil Plait (I featured a video of one of his talks before) strikes again.
Please enjoy this talk and presentation he gave at TED in Boulder, Arizona, about how to defend the earth from asteroids.
A very important point. Why? Do you know why the dinosaurs died out? They did not have a space program and did not see it coming…

Well, humanity has a space program (several), we can still hope.