A test of the brain's electrical activity shows that women commonly use both sides of their brain while men rely more on one. Scientists already know that the two sides of the brain control different functions-one controlling the sense of space, for example, the other controlling language. Some researchers believe that the different ways men and women use their brains evolved from ancient times, when cave men hunted and women cared for the children. Men had to have good aim. Women had to talk to the kids.

检验大脑的电流活动显示，女人通常是左右脑并用，而男人则比较常使用一边的大脑。科学家已经知道左右两边的大脑掌管不同的功能——例如一边掌管空间感，另一边掌管语言。有些研究人员相信，男女使用大脑方式的差异从远古时代演化而来，当时穴居的男人负责狩猎，女人则负责照顾小孩。所以男人必须擅长瞄准，女人则必须和小孩说话。