Submitted by marketrent t3_zxbl6v in space
Maezel t1_j26xn8z wrote
Reply to comment by Chichachachi in Earth was brought to life by ancient water-rich asteroids from the outer Solar System by marketrent
Oh the circle of life... Bacteria oxygen waste triggers a massive extinction. A few billion years later, lifeforms that benefit from oxygen and produce co2 waste trigger another massive extinction.
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