Why is being right-handed more common?

Are you left-handed or right-handed? Chances are you’re right handed, because more people are (though if you’re left-handed, that’s cool too!). So why are more people right-handed? We asked paleontologist Alexander Claxton to help us get to the bottom of this question.  Got a question whose answer you can’t quite put your finger on? Send it to us at BrainsOn.org/contact, and we’ll help point out the answer. See omnystudio.com/listener for privacy information.