Great oxidation event Memes

Earth's first apocalypse happened when cyanobacteria invented oxygenic photosynthesis ~2.5 billion years ago, pumping so much oxygen into the atmosphere that most anaerobic life forms died in what scientists call the "Great Oxidation Event." Fast forward to modern humans discovering fossil fuels and gleefully pumping CO₂ into the atmosphere like SpongeBob ready for round two of planetary self-destruction. History doesn't repeat itself, but it sure does rhyme!