They die sooner? ... They found left handers had died at an average age of 66, while righties died at an average of 75. They also found that left-handers were more than five times as likely to die in industrial and auto accidents—perhaps, they offered, because it is harder for them survive in a right handed world.

Do lefties have a higher IQ?

Although data suggested that right-handed people had slightly higher IQ scores compared to left-handers, the scientists noted that intelligence differences between right and left-handed people were negligible overall.

What is the average lifespan of a left-handed person?

Those who threw and batted with the left hand lived for an average of about 64 years, which was eight months less than the corresponding group of right-handers. Fewer than 0.5 percent of the southpaws lived to age 90, vs. more than 2.5 percent of the right-handers.