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According to this new version of the origin of our species, early humans evolved in relative isolation in different parts of Africa, with occasional periods of connection between different populations that were made possible by environmental conditions much different than those we see today.For example, between 330,000 and 300,000 years ago, summer monsoon rains fell farther north than usual, causing the Sahara to turn green.But Richard Potts, director of the Human Origins Program at the Smithsonian’s National Museum of Natural History in Washington, said the team’s contention that it found early holds water.“Given the fragmented preservation of the finds, the authors do a good job of analysis,” said Potts, who was not involved with the new work.

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“In short, the story of our evolution over the past 300,000 years is mostly the evolution of our brains.”Some experts have questioned whether a primitive human with a brain so distinct from our own can still be considered part of the same species.Although 's arm was shaped more like that of a flying bird's than are modern penguins', with mobile 'elbow' joints rather than rigid, paddle-like flippers.As a result, its underwater 'flight' might have been a bit awkward, says Clarke.Over the last two decades, a combination of genetic evidence and data from the fossil record have led scientists to conclude that the first members of our species evolved in eastern Africa about 200,000 years ago.But a new discovery suggests a more complex narrative for the origin of humans.




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