Over the course of human civilization, men have evolved more feminine traits.
Early human populations were more culturally diverse than previously thought.
Learn about the differences between apes and humans on this Moment of Science.
As we all learned in health class, human beings have 32 teeth. Twenty-eight of them come in before puberty, but the last four teeth, our “third molars,” usually come in during our late teens or early 20′s, when we’re presumably older and wiser, hence their nickname, wisdom teeth. Lean more on this Moment of Science.