Like all creatures, no two individual hominids were alike. And over the millions of years most of the species existed, hominids changed; they evolved; some diverged and became new species.

It’s possible, though, that Danuvius independently evolved a form of upright walking on tree branches that had nothing to do with the appearance of a two-legged gait in hominids, says DeSilva ...

Darwin's great insight, and the unifying principle of biology today, is that all species are related to one another like sisters, cousins, and distant kin in a vast family tree of life.