haritulsidas, 
Scientists have discovered that some microbes can make oxygen without light. This process, called dark oxygenic photosynthesis, involves using hydrogen sulfide instead of water as an electron donor. This finding challenges the assumption that oxygen is a reliable indicator of life on other planets. #microbes #oxygen #astrobiology https://www.quantamagazine.org/underground-cells-make-dark-oxygen-without-light-20230717/
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