Brizendine: It's the details of some emotional events that you have tattooed on your brain - he may not remember at all. We don't know why necessarily that is, the part we do know is that for millions of years, male and female brains have evolved in slightly different niches.
Narrator: Brizendine explains that women had to keep themselves and helpless infants safe and alive in sometimes hostile environments by relying on non-verbal cues.
Brizendine: It's not surprising then the big area of reading emotions in others is something female brains do a little bit faster and they can read more subtle emotions than males. It's not that they can't do it, it's just that they do it faster.
Narrator: For Science Today, I'm Larissa Branin.