Human evolution consider to the evolutionary process leading up to the appearance of modern humans. Whereas it began with the last common ancestor of all life, the topic generally covers only the evolutionary history of primates, particularly the genus Homo, and the emergence of Homo sapiens as a different species of hominids (or "great apes"). The study of human evolution involves several scientific disciplines, including physical anthropology, linguistics, embryology, primatology, archaeology, and genetics.
As per to genetic studies, primates diverged from other mammals about 85 million years ago in the Late Cretaceous period, and the earliest fossils that are appear in the Paleocene, approximately 55 million years ago. The family Hominidae diverged from the Hylobatidae (Gibbon) family 15-20 million years ago, and approximately 14 million years ago, the Ponginae (orangutans), diverged from the Hominidae family.Bipedalism is the basic adaption of the Hominin line, and the earliest bipedal Hominin is referred to be either Sahelanthropus or Orrorin, along with Ardipithecus, a full bipedal, coming somewhat later. The gorilla and chimpanzee diverged around similar time, about 4-6 million years ago, and either Sahelanthropus or Orrorin may be our last shared ancestor with them. The early bipedals eventually evolved into the australopithecines and later the genus Homo.