When did life first arise on Earth? Analysis of ancient rocks in Greenland that contain structures interpreted as bacterial in origin suggest that Earth might have been an abode for life much earlier than previously thought. See Letter p.535
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Allwood, A. Evidence of life in Earth's oldest rocks. Nature 537, 500–501 (2016). https://doi.org/10.1038/nature19429
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DOI: https://doi.org/10.1038/nature19429
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