She says when male and female insects look different, that is called sexual dimorphism – and this can happen in a variety of ...

You’ve probably heard a whole lot of conjecturing about the differences between male and female dogs — maybe your parents told you that girl dogs keep the house tidier, or the guy at the shelter told ...

Young man resting and playing with his two dogs in the park. You’ve probably heard a whole lot of conjecturing about the differences between male and female dogs — maybe your parents told you that ...

Study could help reveal why some mental health disorders vary between men and women — but it's not clear whether the differences are due to sex or gender.

For years, people have been saying that men are from Mars, women are from Venus, but when it comes to both sexes' actual brains, it is almost impossible for scientists to tell them apart. For ...