Why is left-handedness so rare?

It's true, she says, that when you look at rare conditions, like Down Syndrome, epilepsy and cerebral palsy, the ratio of left- to right-handers is more like 50:50 rather than 1:10. Children very quickly show a preference for which hand they use (Credit: iStock). read more

The above statements explain the biological aspects of the Left-handedness which is necessary to understand the biological, evolutionary and social reasons why left handed people are so rare. Biological and Evolutionary reasons. Many theories have been given to explain the occurrence of left-handedness. read more

Scientists have long wondered why left-handed people are a rarity. Stories about being slapped on the wrist for being a lefty aside, there must be some deeper, evolutionary reason, scientists figure. A new study suggests lefties are rare because of the balance between cooperation and competition in human evolution. read more