translation.en: Last question, then: how did we come by this remarkable number of neurons, and in particular, if great apes are larger than we are, why don't they have a larger brain than we do, with more neurons?
translation.zh: 最后一个问题， 我们为什么有数量巨大的神经元， 特别是，如果巨猿 比我们更大， 那为什么他们沒有一个有着更多神经细胞,比我们还大的大脑呢?