It seems like such a simple question, but it's actually one of the most biggest mysteries in all of science. Is it because of how our brains are organized, how ancient humans gripped tools, or is it simple anti-lefty prejudice?
That's the finding of a new study examining the link between cognitive ability and handedness. Lefties score consistently lower on aptitude tests than righties, and left-handedness is cognitively equivalent to being born prematurely. Yeah...this one's going to be controversial.
About 90% of people use their right hand for almost all activities, while the remaining 10% is split between the left-handed and the ambidextrous, people who use either hand with equal comfort. But these "inconsistent-handers" pay a price for their ability to use either hand - a truly bizarre study has discovered that…