How Worried Should You Be About a Space Rock Destroying the Earth?
by Lindsey Ellefson from Lifehacker on (#61HTW)
It's the stuff of disaster movies and sensational headlines: An asteroid, meteor, or comet is headed toward Earth. Are we doomed? Isn't this what took out the dinosaurs? Will we have enough lead time to put our differences aside, come together as a species and mount some kind of technological defense and/or effort to...