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7 Jan 2024

Ancient Bacteria Fossils Discovery Illuminate Photosynthesis Origin

Scientists found [1.75 billion-year-old fossilized bacteria](https://www.vice.com/en/article/v7bjnj/scientists-just-made-a-discovery-about-the-origin-of-life?fbclid=PAAaahDmSEdDmrvWlBCJJYUEKiQ2VUP1IMRC8BHkkFzPRdPJrRerEWalfXFBE) in Australia and Canada, suggesting that oxygenic photosynthesis and the subsequent Great Oxygenation Event occurred at least 1.2 billion years earlier than previously confirmed. This discovery moves the known occurrence of complex photosynthesis that emits oxygen closer to the initial evolution of photosynthesis 3.5 billion years ago.