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澳门金沙开户注册官网:The worst mass extinction may have begun with mass sterilisation

点击量:   时间:2019-03-03 06:12:01

By Colin Barras WE MAY have misunderstood the worst ever extinction. The Permian die-off has been blamed on volcanic eruptions, but instead of killing, the eruptions may have had an insidious effect: sterilisation. Organisms may not have died, but if they could not reproduce, their species were doomed. Scientists have long debated the cause of an event 252 million years ago, at the end of the Permian period, during which most complex life died. Some years ago,