T. rex and the Crater of Doom
Sixty-five million years ago, a comet or asteroid larger than Mt. Everest slammed into the earth, causing an explosion equivalent to the detonation of a hundred million hydrogen bombs. Terrible environmental disasters ensued, including a giant tsunami, continental scale wildfires, darkness and cold followed by sweltering greenhouse heat. When conditions returned to normal, half the genera of plants and animals on Earth had perished. This horrific episode is now widely accepted as the solution as to what caused the extinction of the dinosaurs. The author, one of the four Berkeley scientist who discovered the first evidence for the giant impact, tells the story of the detective work that went into solving the mystery of the dinosaur extinction.