据伦敦动物研究所克劳福教授的新理论,人类是因为吃鱼而脑力大增,懂得思考,人类跟猿猴因为所摄取的食物不同,而导致脑力上的差别。此一理论对人类何以发展出“较大的脑”提出一种简单的化学解释。克劳福教授说,研究显示,较大的草原动物演进过程中,缺乏大脑发展所必须的脂肪酸。克劳福接着说,这些草原动物体型虽然加大,但是脑部未能随着增加,大约减少至2%至0.1 According to Professor Crawford’s theory at the Institute of Zoology in London, humans are brain-boosted because of eating fish, they think about it, and human beings are different from apes because of the food they eat. This theory suggests a simple chemical explanation of why humans develop “larger brains.” Professor Crawford said the research shows that in the larger steppes, the evolution of the animals lacks the fatty acids essential for brain development. Crawford went on to say that although the size of these grassland animals increased, the number of their brains did not increase with each increase to about 2% to 0.1