Human evolution has long been tied to growing brain size, and new research suggests prenatal hormones may have played a surprising role. By studying the relative lengths of index and ring fingers — a ...

Take a second and look at your hands. Specifically, compare your ring finger to your index finger. If your ring finger’s a little shorter, congratulations: you might be biologically engineered for ...

Have you ever wondered why your fingers aren't all the same length? It may seem like a small detail, but scientists say every finger has a specific purpose. According to a biological anthropologist, ...

A study of 225 newborns suggests prenatal estrogen may have played a role in the evolution of larger human brains. Boys with finger-length patterns linked to higher estrogen exposure before birth ...