Biggest mass extinction left ocean animals gasping for breath, study shows

Syndicate Post image
Illustration showing pattern of species loss during the ‘Great Dying’ extinction, when oceans became starved of oxygen, and a computer model simulating the event. Large quantities of carbon dioxide (CO2) greenhouse gas poured into the atmosphere from volcanic eruptions on the super-continent ‘Pangaea’ (Justin Penn and Curtis Deutsch/University of Washington/PA)