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 ...

About 90 percent of Americans are right-handed, while about 10 percent are left-handed. While most people are pretty confident about whether they are left- or right-handed, there is a surprisingly ...

Are there two or three forms of handedness? Most psychological studies investigating handedness have two different categories: left-handedness and right-handedness. A large-scale meta-analysis ...