Question

What is the Out-of-Africa theory?
It has to be 200 words

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Answer 1

In paleoanthropology, the recent African origin of modern humans, also called the "Out of Africa" theory (OOA), recent single-origin hypothesis (RSOH), replacement hypothesis, or recent African origin model (RAO), is the dominant[1][2][3] model of the geographic origin and early migration of anatomically modern humans (Homo sapiens). It follows the early expansions of hominins out of Africa, accomplished by Homo erectus and then Homo neanderthalensis.

Successive dispersals of

Homo erectus (yellow),

Homo neanderthalensis (ochre) and

Homo sapiens (red).

Expansion of early modern humans from Africa through the Near East

Map of the migration of modern humans out of Africa, based on mitochondrial DNA. Colored rings indicate thousand years before present.

The model proposes a "single origin" of Homo sapiens in the taxonomic sense, precluding parallel evolution of traits considered anatomically modern in other regions,[4] but not precluding multiple admixture between H. sapiens and archaic humans in Europe and Asia.[note 1][5][6] H. sapiens most likely developed in the Horn of Africa between 300,000 and 200,000 years ago.[7][8] The "recent African origin" model proposes that all modern non-African populations are substantially descended from populations of H. sapiens that left Africa after that time

Answer 2

Answer:

Africa is in a profound sense the fount of human evolution. Not only did our zoological family Hominidae (Homo sapiens plus its extinct close relatives, often nowadays restricted to the subfamily Homininae; for the purposes of this article the difference is merely notional) originate there ca. 7 Ma (1), but over the past 2 Ma the continent has regularly pumped out new kinds of hominid into other areas of the Old World (2). The genus Homo evolved in Africa at some time ca. 2 Ma [all older contenders to Homo status are debatable (3, 4)], then rapidly spread out of its natal continent to populate Eurasia for the first time (5, 6). The first truly cosmopolitan species of Homo, Homo heidelbergensis, is first known from Africa at ca. 600 Ka (7), before appearing at sites in Europe and eastern Asia from ca. 500 Ka onward. The now-ubiquitous species H. sapiens, to which all living human beings belong, is initially documented in Africa as, somewhat later, is the first material evidence of the symbolic cognitive system that appears to be unique to humans.

Explanation:

that might be a lot more than 200 words