Bipedalism
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Bipedalism is a form of terrestrial locomotion where an animal moves by means of its two rear limbs or legs. An animal or machine that usually moves in a bipedal manner is known as a biped, meaning 't
An ostrich, the co-fastest extant biped at 70 km/h (43 mph)
A Man Running; by Eadweard Muybridge
A group of children racing
ASIMO – a bipedal robot
Human
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Humans are the most abundant and widespread species of primates, characterized by bipedalism, minimal body hair, and large, complex brains enabling the development of advanced technology, culture, and
Bipedalism
…facultative" (i.e. optional) or "obligate" (the animal has no reasonable alternative). Even this distinction is not completely clear-cut — for example, humans other than infants normally walk and run in biped fashion, but almost all can crawl on hands and knees when necessary. There are even reports of humans…
Akha cropped hires
Reconstruction of Lucy, the first Australopithecus afarensis skeleton found
Great Pyramids of Giza, Egypt
Medieval French manuscript illustration of the three classes of medieval society from the 13th-century Li Livres dou Santé