The biggest mass extinction event in Earth’s history was caused by a volcanic eruption in Siberia that spewed carbon dioxide (CO2) into the atmosphere, scientists say.  The Permian–Triassic extinction event, also known as the ‘Great Dying’, wiped out 95 per cent of marine species and 70 per cent of terrestrial species at the time.  When the … Continue reading The biggest mass extinction in history was triggered by an enormous volcanic eruption in Siberia which spewed huge amounts of carbon dioxide into the atmosphere