Why am I left-handed?

from  Discovery

Feb 13, 2017

Neal Shepperson asks, "What determines left or right handedness and why are us lefties in the minority?" One in ten people are left-handed, but where does this ratio come from and when did it appear in our evolutionary past? Hannah talks to primatologist Prof Linda Marchant from Miami University about why Neanderthal teeth could hold the answer. Prof Chris McManus from University College London tells Adam about his quest to track down the genes responsible for whether we're right or left hand...more

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