The wholesale destruction of the Earth is a very hot topic these days what with the Mayan apocalypse upon us and all. To be honest a two mile wide asteroid smashing into us is a real possibility even if ancient calendar predictions aren’t. In this video a super-team of experts (including my favorite astrophysicist Neil deGrasse Tyson, what, you don’t have a favorite astrophysicist?) discuss what it takes to save the Earth from possible asteroid-based destruction.