September 24, 2007
The Greatest Dying
Two hundred fifty million years ago, a monumental catastrophe devastated life on Earth. We don't know the cause-perhaps glaciers, volcanoes, or even the impact of a giant meteorite-but whatever happened drove more than 90 percent of the planet's species to extinction. After the Great Dying, as the end-Permian extinction is called, Earth's biodiversity-its panoply of species-didn't bounce back for more than ten million years. READ MORE >>
