May 14, 2013

Documentary: The Day The Earth Nearly Died

The demise of the dinosaurs, 65 million years ago (at the so-called K/T boundary), was nothing compared to the Permian mass extinction. The K/T event killed off 60% of life on Earth; the Permian event 95%. Geological data to explain the destruction have been hard to find, simply because the rocks are so old and therefore subject to all kinds of erosion processes. It seems plausible that some kind of catastrophic environmental change must have made life untenable across vast swathes of the planet.