Name: Peter Ward——物种大灭绝
Uploaded: 2009-01-27T01:00:00Z
Duration: 19 min 22 s
Description: 小行星撞击得到了全部关注。但是《美狄亚假说》的作者Peter Ward认为地球上物种大灭绝是由低等细菌引起的。罪魁祸首是一种叫做硫化氢的有毒物质，在医学上，它可能会成为一种有趣的应用。

小行星撞击得到了全部关注。但是《美狄亚假说》的作者Peter Ward认为地球上物种大灭绝是由低等细菌引起的。罪魁祸首是一种叫做硫化氢的有毒物质，在医学上，它可能会成为一种有趣的应用。

Peter Ward——物种大灭绝

Earth’s greatest die-offs were often caused by toxic bacteria releasing hydrogen sulfide, not just cataclysmic impacts from space. Evidence from ancient rocks reveals that high CO2 and suffocating purple oceans wiped out complex life repeatedly, while a single mammal-like reptile’s survival shaped our own existence. Surprisingly, the same deadly gas now shows promise as a tool to save lives in medical emergencies. This story challenges the comforting idea that life always preserves itself.