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How old is water on earth?

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Investigating lunar samples carried to Earth by the Apollo 15 and 17 missions found a deuterium-to-hydrogen ratio that matched the isotopic ratio in carbonaceous chondrites. The ratio is also similar to that found in water on Earth. The findings suggest a common source of water for both objects. read more

The Water On the Moon Probably Came From Earth A 2.1 Billion-Year-Old Meteorite Reveals Water on Mars Water is so vital to our survival, but strangely enough, we don’t know the first thing about it—literally the first. read more

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