Most of us have heard of hibernation—the period where bears go dormant to escape harsh winter conditions. But, did you know that some frogs also undergo a form of hibernation? It is known as aestivation, and it is a period of dormancy associated with dry, summer conditions. Scientists think that aestivation evolved so animals could cope with challenges like limited food and water supplies. During aestivation, an animal dramatically decreases its metabolic rate for many months to conserve energy—this depression in metabolic rates may be the only way to stay alive.

中文翻译：

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睡美人-青蛙在没有氧气的情况下如何存活？

我们大多数人都听说过冬眠-熊进入休眠状态以躲避严酷的冬季条件的时期。但是，您知道有些青蛙也经历了冬眠吗？这被称为“耕作”，这是与干燥，夏季条件相关的休眠期。科学家们认为，自发的进化可以使动物应付食物和水供应有限等挑战。在吸血期间，动物会大幅降低其新陈代谢速度达数月之久以节省能量-这种新陈代谢速度的下降可能是维持生命的唯一途径。