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Continue to ChatScience: What did life on earth breathe before Oxygen? The answer: ARSENIC!! http://historyreviewed.best/index.php/science-what-did-life-on-earth-breathe-before-oxygen-the-answer-arsenic/
Science: What did life on earth breathe before Oxygen? The answer: ARSENIC!! http://historyreviewed.best/index.php/science-what-did-life-on-earth-breathe-before-oxygen-the-answer-arsenic/