EcoAlert --Mathematics Predicts Earth's 6th Mass Extinction Threshold Reached in 2100: "After Oceans Add 300 Gigatons of Carbon from Human Activities"

"How can you really compare these great events in the geologic past, which occur over such vast timescales, to what's going on today, which is centuries at the longest?" says MIT geophysicist Daniel Rothman. "So I sat down one summer...