WHY ARE SOME PEOPLE LEFT-HANDED? Today, about one-tenth of th | TEDxSHOW
WHY ARE SOME PEOPLE LEFT-HANDED?
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.
