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Volcanism led to a first oxygenation of Earths atmosphere 2,5 billion years ago

Researches published a new study explaining mysterious oxygen spike millions of years before it became a permanent part of our Earths atmosphere.


  • There was an unexplained spike of oxygen 100 millions years before its permanent presence in Earths atmosphere 2,4 billions years ago.
  • New research shows corresponding mercury abundances shortly before the oxygen spike. It came from a volcanic activity which released nutrients that fed bacteria in water
  • Bacteria thrived and released large amounts of oxygen into the atmosphere
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