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They have "vestigial thumbs" on their hands, and large big toes on their feet. They are descended from thumbed monkeys, but have evolved/adapted to their arboreal (tree-swinging) lifestyle by having no actual opposable thumb.

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10y ago
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12y ago

basicly they don't need them because they are just not useful to them they manage without them and that is ok but they use there tail alot more than us lol only joking i mean other monkeys

well hope this helped ya xxx Katie

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11y ago

so they can grab each one of your limbs (arms,legs) hold you down and t-bag you

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12y ago

It's in thier genes

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Q: Why do spider monkeys have 4 fingers?
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