humans make them more like us, study says

January 22, 2015 7:01 PM

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WASHINGTON (AP) — Some of our tree-swinging pre-human ancestors may have been a bit more like us than previously thought, thanks to a tiny section of their thumbs.

One key attribute that separates humans from other animals is our opposable thumb, and the way parts of the thumb are structured to allow for a strong yet precise grip that fostered advanced use of tools. It's what allows us to throw items more precisely, pick guitars and turn a key.

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