Did Earth’s Water Come from Space? New Clues from Lunar Samples

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Did Earth’s Water Come from Space? New Clues from Lunar Samples

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This episode examines new evidence from Apollo-era lunar samples suggesting that most of Earth’s water did not come from asteroid or comet impacts.

By studying oxygen isotopes preserved on the Moon’s stable surface, researchers found that meteoritic contributions were surprisingly small.

These findings challenge long-standing theories about the origin of Earth’s oceans, while offering new insight into how our planet became habitable—and how lunar resources could s

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