Bipedalism is a type of terrestrial animal movement involving ambulation by use of two legs. Humans, apes, some lizards and insects, and birds are the only living animals that can move bipedally, although the skill is believed to have begun with reptiles that preceded the dinosaurs. Humans are the only hominids, the family of great apes that includes chimpanzees and gorillas, that can walk on two legs consistently. Early humans evolved the muscles and skeletal system required to walk upright... więcej

Salem Press Encyclopedia of Science, 2023. 3p.