但是，科学研究正在揭示这几次大灭绝如何改变地球生物的命运——比如，决定了首先出现在陆地的动物和统治海洋的生物。
But research is uncovering how these extinction events dictated the fate of life on this planet-for instance, determining which animals first crawled onto land and which ruled the oceans.
另一个近期发表在《科学杂志》上的研究表明，由于气候变化导致的猛烈风暴会造成新的臭氧层空洞，增加陆地和海洋的紫外线辐射剂量。
Another recent study, this one in the journal Science, says the severe storms delivered by climate change could punch new holes in the ozone layer, upping our dose of radiation on land and at sea.
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