澳门金沙网上娱乐平台:Quick death

时间:2019-03-06 01:04:07166网络整理admin

THE victims of the world’s biggest mass extinction, at the end of the Permian period, all died within a few thousand years of each other. Some 95 per cent of the planet’s species perished during the mass extinction, but its duration has always been uncertain. By analysing data on 333 marine species, a team led by Yugan Jin at the Nanjing Institute of Geology and Palaeontology has pinned down the duration of the extinction to 160 000 years (Science, vol 289,