A few naturalists—Charles Darwin most prominent among them—theorized that humans' earliest ancestors were African: Darwin pointed out that chimpanzees and gorillas, humans' closest relatives, evolved and exist only in Africa. habilis for several hundred-thousand years, which tends to confirm the hypothesis that they represent separate lineages from a common ancestor; that is, the ancestral relationship between them was not anagenetic, but was cladogenetic, which here suggests that a subgroup population of habilis—or of a common ancestor of habilis and erectus—became reproductively isolated from the main-group population, eventually evolving into the new species Homo erectus.
From the 1950s forward, numerous finds in East Africa confirmed the hypothesis of an African genesis, providing fossil evidence that the earliest hominins originated there. erectus descended from either: 1) the earliest hominin genera (such as Australopithecus, and possibly Ardipithecus—of which is still debated whether it is hominin or hominid); or 2) the earliest Homo-species (such as Homo habilis or Homo ergaster). The fossil is considered the earliest evidence of the Homo genus known to date, and seems to be intermediate between Australopithecus and H. The individual lived just after a major climate shift in the region, when forests and waterways were rapidly replaced by arid savannah, which was a domain favored by the early hominins.
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Homo erectus (meaning "upright man", from the Latin ērigere, "to put up, set upright") is an extinct species of hominin that lived throughout most of the Pleistocene geological epoch.
In other instances, mixed groups were formed, sometimes to later split.Excavations at Dmanisi have yielded 73 stone tools for cutting and chopping and 34 bone fragments from unidentified fauna. After their initial assessment, some scientists were persuaded to name the Dmanisi find as a new species, Homo georgicus, which they posited as a descendant of African Homo habilis and an ancestor to Asian Homo erectus.This classification, however, was not supported, and the fossil was instead designated a divergent subgroup of Homo erectus. It evolved from the Scouting movement in the early years of the 20th century.Girls were attracted to Scouting from its inception in 1907.