That's when the dinosaurs went extinct, that's when 75 percent of the animal and plant species went extinct, and that's when mammals overtook their ecological niche, and to anthropomorphize, biological evolution said, "Hmm, this neocortex is pretty good stuff," and it began to grow it.
那是恐龙走向灭绝的时候， 是百分之七十五的动植物 走向灭绝的时候， 也是哺乳类动物 取代生态位， 而达到人格化，生物进化学说道， “嗯，这个新大脑皮层是个好东西，” 于是开始发展。