The majority of mammals are born with a brain close to 90% of the adult weight, while humans are born with 28%, bottlenose dolphins with 42.5%, chimpanzees with 54%, and elephants with 35%.
Většina savců se rodí s mozkem o cca 90 % hmotnosti mozku dospělého jedince, zatímco lidé se rodí s 28 %,delfíni skákaví s 42,5 %,] šimpanzi s 54 %,a sloni s 35 %.