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    Human Hand Dexterity Information Revealed by the Discovery of a Bone

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    Geo Beats

    by Geo Beats

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    An ancient hand bone uncovered at a burial site in Kenya, Africa is evidence that human hand dexterity might have evolved over 600 thousand years earlier than previous estimates.

    An ancient hand bone uncovered at a burial site in Kenya, Africa is evidence that human hand dexterity might have evolved over 600 thousand years earlier than previous estimates.

    The well preserved bone is a metacarpal that connects to the middle finger, and although it is 1 point 42 million years old, it resembles the same ones found in modern humans.

    It has a styloid process, which is the morphological feature of the bone that allowed humans to be strong enough to grip and use tools.

    Carol Ward, professor of pathology and anatomical sciences at the University of Missouri, Columbia said: “With this discovery, we are closing the gap on the evolutionary history of the human hand. This may not be the first appearance of the modern human hand, but we believe that it is close to the origin, given that we do not see this anatomy in any human fossils older than 1.8 million years.”

    The site in Kenya is located in West Turkana, where the oldest Acheulian tools have been found, which are shaped stone tools that date back to over 1 point 6 million years ago.