Left-handed men earn 4% more than right-handed men, a new study reports. What’s going on? Researchers aren’t sure, but they have a hypothesis. Our brains are contralateral — that is, the right hemisphere controls the left side of the body and the left hemisphere the right side. And this, say researchers, “may explain why left-handers have some advantage in dealing with novelty — they are more inclined to use the right hemisphere of their brain than their left.”