You have your mom's smile, your dad's eyes, and the ear muscles of a Triassic mammal.
Studies of the energy-harvesting proteins in primitive cells suggest that key features of photosynthesis might have evolved a billion years earlier than scientists thought.
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?
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