Ancient oceans stayed oxygen rich despite extreme warming

ScienceDaily
Jan 29, 2026, 2:12 pm53 pts
Scientists studying ancient ocean fossils found that the Arabian Sea was better oxygenated 16 million years ago, even though the planet was warmer than today. Oxygen levels only plunged millions of years later, after the climate cooled, defying expectations. Powerful monsoons and ocean circulation appear to…

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