让赖歇特感到吃惊的是，他发现哺乳类的两块耳骨与爬行类颚部的一些骨片相吻合。

He was astonished to find that two of the ear bones in mammals corresponded to pieces of the jaw in reptiles.

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舒宾写道：“结论不可避免：构成爬行类颚部一部分的鳃弓，同样也构成了哺乳类的耳骨。”

Shubin writes: "the conclusion was inescapable: the same gill arch that formed part of the jaw of a reptile formed ear bones in mammals."

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约有20%的海生群落以及多数类似哺乳类的生物，很多大型的两栖动物，和所有的非恐龙的祖龙都灭绝了。

About 20 percent of all Marine families went extinct, as well as most mammal-like creatures, many large amphibians, and all non-dinosaur archosaurs.

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From a psychological point then, animals have evolved to be nice to their kin, particularly their children, and particularly in birds and mammals.

从心理学角度看，动物进化趋向于对自己的亲人有益，特别是自己的孩子，以鸟类和哺乳类为代表。

耶鲁公开课 - 心理学导论课程节选

For birds and mammals, we don't have many kids but so we devote a huge amount of psychological energy to protecting the ones that we have.

鸟类和哺乳类，没有很多孩子,所以我们用大量的心力,去保护我们有的孩子。

耶鲁公开课 - 心理学导论课程节选