Curiously, as 50-day-old fetuses, chimps and other nonhuman primates have brains just as large as humans and thus seem to have comparable embryonic potential for extensive brain growth.

• 教人好奇的是，无论黑猩猩还是其他非人类灵长类，发育了50天的胚胎，大脑都与人类的一样大，因此大脑在牠们的胚胎里似乎也有大幅增长的潜力。