252 million years ago, the Earth was in a really bad place. At the boundary of the Permian and Triassic periods, our biosphere experienced its most dramatic mass extinction event (so far), one so utterly complete that it has been solemnly termed the “Great Dying.” Precious little was spared, and it’s generally been…
Source: Gizmodo – Terrifying Ocean Predator Changes Our View of the Worst Mass Extinction in History