Did the Reign of Dinosaurs Begin, as Well as End, with a Meteorite Strike?
Scientific American said:
Roughly 200 million years ago, at least half the species on Earth died off over the course of about 100,000 years, both on land and in sea. This mass extinction, at the boundary between the Triassic and Jurassic periods and one of five known such events in Earth's geologic history, set the stage for dinosaurs to rise to prominence and dominate the planet's terrestrial life for the next 135 million years.
Edited by Waspie_Dwarf, 17 September 2012 - 07:50 PM.