We’ve all heard the whispers. Those southpaws among us supposedly have some kind of secret intellectual edge. From Leonardo da Vinci sketching with his left hand to Einstein supposedly jotting down ...

NPR's Ayesha Rascoe speaks with Clyde Francks, a geneticist in the Netherlands, about the latest research into what makes people left or right-handed. If you're left-handed, like me, you know you are ...