Submission + - Comet Killed Mammoths
anthemaniac writes: LiveScience is reporting that a huge comet impact — actually an air burst — wiped out the mammoths and many other creatures about 13,000 years ago. Evidence includes nanodiamonds and iridium (signs of an extraterrestrial object) at 50 spots across a wide area from California to Canada and Europe. Lack of a crater suggests the objects exploded above the surface, like the 1908 Tunguska event in Siberia.