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 Why Don't Sleeping Bats Fall Down?
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 A** (es_albert)
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Why Don't Sleeping Bats Fall Down?



Bats sleep upside down, so how come they don¡¯t fall? Turns out that they¡¯ve got some unusual legs.


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2015-11-10 ¿ÀÈÄ 3:43:19
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