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Why are some people left-handed?

SHARING IS CARING!
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Today, about one-tenth of the world’s population are southpaws. Why are such a small proportion of people left-handed — and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitive and cooperative pressures on human evolution.

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SHARING IS CARING!
Share on Facebook11Share on Google+0Tweet about this on TwitterPin on Pinterest0Share on Reddit0