A suite of studies has revealed brain lateralization in species from fish to primates.Last August, for instance, scientists discovered that in the wild, chimpanzees show hand preferences.

• 有一组研究指出，从鱼类到灵长类皆有大脑侧化的现象，举例来说，2005年8月，科学家发现野生黑猩猩也会表现偏利手。