The Great Asteroid and the End of the Dinosaurs
Smithsonian / National Academies of Sciences - January 20, 2005
Imagine an asteroid, six miles wide and larger than Mt. Everest, hurtling toward Earth at a speed of 100,000 to 250,000 kilometers per hour. Could anything survive its impact? This scene may sound like the plot of a Hollywood movie. But in fact, this event really did occur and, as many scientists believe, it changed life on our planet forever.