Friday, August 14, 2015

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."

1 comment:

  1. I am left-handed. I am in my right mind .