A new study sheds light on the role of sexual behavior in apes, which has implications for understanding its evolutionary ...

Males' canines are twice as long as females'. That's because in gorilla society, males compete for exclusive mating rights to the entire female troop, and the male with the longest, most ...

We don't just have sex to reproduce - new research suggests that using sex to manage social tension could be a trait that existed in the common ancestor of humans and apes six million years ago.