define hibernation.. in detail
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Hibernation is a way for many creatures – from butterflies to bats – to survive cold, dark winters without having to forage for food or migrate to somewhere warmer. Instead, they turn down their metabolisms to save energy. Animals in hot climates also undergo a form of hibernation called aestivation.
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Hibernation is when an animal slows its heart rate to save energy and survive the winter without eating much.
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