Australopithecus sediba is a species of Australopithecus of the the early Pleistocene, identified based on fossil remains dated to about 2 million years ago. The species is known from at least four partial skeletons discovered in the Malapa Fossil Site at the Cradle of Humankind World Heritage Site in South Africa, one a juvenile male (MH1, the holotype), an adult female (MH2), at least one other adult and an 18-month-old infant. The MH1 and MH2 fossils were buried together, and have been dated to between 1.977 and 1.980 million years ago.
Over two hundred and twenty fragments from the species have been recovered to date. The partial skeletons were initially described in two papers in the journal Science by American and South African palaeo-anthropologist Lee R. Berger and colleagues as a newly discovered species of early human ancestor called Australopithecus sediba (“sediba” meaning “natural spring” or “well” in the Sotho language).