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early EarthScience News
•84% Informative
Researchers analyzed oxygen molecules within 4-billion-year-old zircon crystals from Western Australia’s Jack Hills , one of the oldest rock formations on Earth .
Previous studies have found evidence that a robust water cycle existed by at least 3.2 billion years ago .
The finding suggests freshwater may have been actively cycling on Earth hundreds of millions of years earlier than previously thought.
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92
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