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Modern humans have opposable thumbs but not opposable toes.

An opposable thumb means that you can touch the tips of your other fingers with the tip of your thumb, but not with any of the other fingers. This allows you to hold and manipulate objects with more precision.

An opposable big toe is similarly useful for gripping objects with the feet. This would be particularly useful for an animal which climbed trees, as our ancestors did.

See http://en.wikipedia.org/wiki/Thumb

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Related Questions

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