Doomsday 1: An Asteroid Wiped Out the Dinosaurs—Will We Be Next?
It started with a flash. At a few minutes past 9:00, one crystalline morning last February, a burst of light brighter than 30 suns illuminated Chelyabinsk, Russia, a southern industrial city known mostly for making tractors. Thanks to smartphones, surveillance cameras, and Russian auto-dash cams, we...