New research suggests left-handed people may be more competitive than right-handers, offering clues to an evolutionary advantage.

Picture this: You're signing a credit card receipt at the bank, using one of those pens attached to a short chain. As a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It's possible you know someone who is left handed or perhaps you're a lefty. Aside from the fact that ...