Many Species of Humans Coexisted for a Million Years
Credit: MU News Bureau
Three early species belonging to the genus Homo have been identified prior to modern humans, or Homo sapiens. Homo rudolfensis and Homo habilis were the earliest versions, followed by Homo erectus and then Homo sapiens. Because the oldest erectus fossils that have been found are only 1.8 million years old, and have different bone structure than the new fossil, Ward and her research team conclude that the fossils they have discovered are either rudolfensis or habilis. Ward says these fossils show a diversity in the physical structures of human ancestors that has not been seen before.
Hilary Sale and paper co-author Matthew Skinner pose at the Koobi Fora site in Kenya where they uncovered the ancient fossils.
Credit: Fred Spoor
A small piece of the fossil femur was first discovered in 1980 at the Koobi Fora site in Kenya. Project co-investigator Meave Leakey returned to the site with her team in 2009 and uncovered the rest of the same femur and matching pelvis, proving that both fossils belonged to the same individual 1.9 million years ago.
Source: http://www.ineffableisland.com/2015/03/many-species-of-humans-coexisted-for.html
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