The Presidential Daily Brief


  1. Human Fossils

    Analysis Suggests Humans Evolved From Multiple Populations

    Instead of evolving from a single ancestral group in one geographic region, as previously believed, a team of experts propose that Homo sapiens arose from several isolated populations across Africa that occasionally crossed paths to interbreed. In a new analysis of current scientific literature, researchers challenge the theory that all humans descended from “Mitochondrial Eve,” a woman who lived between 150,000 and 200,000 years ago. They found that human fossils from different regions of Africa show a diverse mix of modern traits and “archaic” characteristics that have been lost to evolution.

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