人类最近的动物园亲戚遇到的生活中有很多像我们一样。从28岁左右开始，黑猩猩和猩猩变得越来越有点大男子主义的，他们喜怒无常 - 我们可以称之为抑郁症。
Humanity’s nearest zoological relatives experience mid-life a lot like we do. Beginning about age 28, chimps and orangutans become less sociable, they get moody — we might call it depression — and they are less driven to achieve goals like mating or getting a difficult-to-reach toy.
“This suggests