dsinc contributes a link to Neil deGrasse Tyson's short piece in Wired on how we could deal with the very real threat of killer asteroids , writingFrom the article: "Saving the planet requires commitment. First we have to catalogue every object whose orbit intersects Earth’s, then task our computers with carrying out the calculations necessary to predict a catastrophic collision hundreds or thousands of orbits into the future. Meanwhile, space missions would have to determine in great detail the structure and chemical composition of killer comets and asteroids."