and the most primitive hominid species known. Discussion continues over whether Ardipithecus is a hominid or not, whether it walked on two feet or not, and what its relationship is to the 3.9?.

At the most basic level, human evolution is articulated through classifications of, and evolutionary relationships among, hominin species ... in usage of the term "hominid." ...

As scientists discover new fossils, the hominid family tree grows new branches. But fossils are often difficult to categorize neatly as one species or another. Like all creatures, no two ...

superseding all other hominid species. The implication of this argument is that all modern people are ultimately of African descent. The other theory, known as the 'Multi-regional' Model ...

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.