Saturday, February 7, 2015

The Importance of Left-Handedness

From TEDed

This is for all the south-paws in our lives. And yes, left-handedness actually runs in my family.

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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