translation.en: Our brain weighs between 1.2 and 1.5 kilos, but elephant brains weigh between four and five kilos, and whale brains can weigh up to nine kilos, which is why scientists used to resort to saying that our brain must be special to explain our cognitive abilities.
translation.zh: 我们的大脑重量 1.2 和 1.5 公斤之间 但大象脑子称之间四、 五公斤 鲸鱼大脑可重达 9 公斤 这就是为什么科学家们用来诉诸说 我们的大脑肯定是非常特别地 来解释我们的认知能力。