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Ancient Earth had More Oxygen Than Previously Thought

Researchers say the Earth had much more oxygen than thought nearly a billion years ago, a finding that could recast theories about how life on Earth evolved. The conclusion was reached by researchers from Brock University in Canada who developed a method to analyze the atmosphere of ancient Earth by analyzing tiny air bubbles trapped in salt crystals. Specifically the team from Brock University wanted to measure the levels of oxygen in the Earth’s atmosphere nearly a billion years...

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