Even before there were Homo sapiens, our distant forebears had a mix of genes for light and dark skin.
Early embryos may have come to depend on the tricks viruses use to manipulate them.
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Study reveals that sleep may have deep evolutionary roots.
The discovery that viruses move between species unexpectedly often is rewriting ideas about their evolutionary history — and may have troubling implications for the threat from emerging diseases.
Would something like us have appeared if that asteroid had missed?
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Not so long ago, homo sapiens shared the planet with close relatives, including Neanderthals. Who were they, and what happened to them?
Current extinction rates are 50 times higher than expected background rates, suggesting that another mass extinction event is underway
The origin of the domestic cat, Felis catus, is radically different from the origin stories of our other domestic animals. All of them are deliberate human creations. Cats appear to have domesticated themselves.
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