EARTH Magazine: When Earth Hit the Reset Button on Life
From EARTH Magazine, November 3, 2016 -- The Permian-Triassic extinction event wiped out 96% of all marine life and at least 75% of terrestrial life. It is the largest of the "Big Five" extinction events in Earth history, and it defined the boundary between the Paleozoic and the Mesozoic geologic eras. EARTH Magazine explores new research on the "P-T" mass extinction to look at what caused it, and how it can inform our understanding of today's ongoing extinction event.