这可能是进化的手段，以确保动物王国那些比其他新生儿更具依赖性，需求更多的婴儿能得到更长久的照顾。
This may be evolution's way of ensuring more constant care for a baby that is more dependent and demanding than any other newborn in the animal kingdom.
从进化学的角度讲，这意味着新生的神经元很可能会帮助你记住那只差点吃掉你的狮子。
In evolutionary terms, it means new neurons are likely helping you to remember the lion that nearly killed you.
进化不时会演化出一种会继续开拓世界大部分领土的新生物。
Every now and again evolution throws up a new kind of creature that goes on to colonize most of the world.
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