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Edward Voskoboynik Anthropology111 Wolpoffs Multiregional Model In a March 26 1999 issue of Science G A Clark contributed an article entitled Highly Visible Curiously Intangible subtitled modern human origins research This article tackles the issues surrounding the two competing models of human evolution the continuity model and the replacement model Clark borrowed the title from the geneticist Henry Harpendings phrasea highly visible yet intangible field which Harpeding used to describe the controversial endeavor to trace the modern human origins Clark states that until scientists make explicit paradigms for both replacement and continuity models each model supporter camp will interpret common variables differently to make them fit each respective model Clark 1999 wrote We are in effect consumers of one anothers research conclusions but we select among alternative sets of research conclusions in accordance with our biases and preconceptions These biases and preconceptions must be subjected to critical scrutiny As long as there is no explicit concern with the logic of inferencehow we know what we think we know about the pastthere can be no consensus Clark 1999 p 2029 This paper will trace the origins of hominids from the 44 mya Australopithecine period to the 100 tya Homo sapien period It will side with the multiregional continuity model of hominid evolution however several sittings from works that support the replacement model will be incorporated into this paper in order to compare and contrast the significant differences in the two models Most experts in the field of anthropology agree that the first erect bipeds called the early hominids appeared in East Africa about four million years ago They were given the name Australopithecusbeing very primitive hominids with small craniums and elongated arms they were not known to have used fire or made tools Researchers are aware of a few species of early hominids which gave rise to the genus Homo According to Roberts
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