# 8 The Dumbest Animals in the World: Koala
An Australian favorite that people can’t get enough of. We just love to watch them ride and just watch. But this is mainly due to the fact that the level of their brain is equivalent to the constant beatings while high. They have the smallest brains of any known mammal.
These dumbest animals enjoy eucalyptus leaves. They will tear each other apart for it, even if they eat any leaf. Plus, eucalyptus is difficult to digest even with the four stomachs of a koala. Admittedly, the adorable animal also lacks any sense of hygiene and is famous for spreading disease. We’re talking about chlamydia. Koalas are adorable, so they have a right to be eccentric.