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Why Spider Monkeys Only Have Four Fingers
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4,200 بازدیدها·
12/19/17
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Discovery
Unlike virtually every other primate, spider monkeys have no thumbs, which could snag on the branches. Instead, their four long fingers form a perfect hook to help them swing on branches. From the Series: Amazing Monkeys: The Americas http://bit.ly/2y7TQ5Y
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