Scientists may have misread a 2-billion-year-old clue about Earth

Scientists re-examining a 2-billion-year-old chemical signature now believe it may have been created by local magma, hydrocarbons, and methane-eating microbes rather than a global change in Earth’s carbon cycle. This finding casts doubt on previous theories about the oxygenation of early Earth.

Sources

• ScienceDaily — Scientists may have misread a 2-billion-year-old clue about Earth

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