Great Oxygenation Event: MIT Scientists’ New Hypothesis for One of the Grand Mysteries of Science - SciTechDaily

Microbes and Minerals May Have Set Off Earth’s Oxygenation Scientists propose a new mechanism by which oxygen may have first built up in the atmosphere. For the first 2 billion years of Earth’s history, there was barely any oxygen in the air. While some micro…

Around 2.3 billion years ago, oxygen began building up in the atmosphere, eventually reaching the life-sustaining levels we breathe today. A new hypothesis proposed by MIT scientists suggests a mecha… [+6178 chars]

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