The researchers say their findings add to the evidence that the evolutionary forces that cause right- and left-handedness are independent of culture.

BBC: Cave handprint, Montpellier University

George Michel, a professor of psychology at the University of North Carolina at Greensboro who has studied handedness in infants, described handedness as a continuum shifted largely to the right.

WSJ: Baseball's Oddest Fraternity

They suggest that because left-handedness is relatively rare it provides certain advantages over those who are right-handed, such as in solo and group fighting.

BBC: Cave handprint, Montpellier University

This brazen high- handedness, based on nothing more than a judges whims about what he thought was right for the people, was too much even for his peers to stomach.

FORBES: Fact and Comment