Some researchers say that men can have 'women's brains' and that women can think more like men.
- Get a brain sex profile and find out if you think like a man or a woman.
- See if you can gaze into someone's eyes and know what they're thinking.
- Find out why scientists are interested in the length of your fingers.
- See how your results relate to theories about brain sex.
BBC - Science & Nature - Sex ID