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Molecular clock analysis shows bacteria used oxygen long before widespread photosynthesis

  • PHYSorg faviconPHYSorg

    Apr 3, 2025, 2:00 pm119 pts
    Microbial organisms dominate life on Earth, but tracing their early history and evolution is difficult because they rarely fossilize. Determining when exactly a particular group of microbes first appeared is especially hard. However, ancient sediments and rocks hold chemical clues of available nutrients that…
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