How different are men and women?

Men are larger than women, on average, which means that their brains are larger on average, too (about 10%, in fact). But bigger isn't better when it comes to brains. The truth is that quality trumps quantity, and the sexes have different advantages: women get their superior language skills from a larger frontal and temporal cortex, while men have superior spatial skills thanks to a more active left hippocampus.