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Our Human Ancestors Very Nearly Went Extinct 900,000 Years Ago, Genetics Suggest

University of Wisconsin-Madison population geneticist Aaron Ragsdale, who wasn’t involved in the research, says the study raises some very intriguing questions about human evolution during a time period from which both genetic and fossil data are relatively scarce. “I am eager to see if their results are replicated using other methods,” Ragsdale says.