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Liquid Acquisition

Two new scenarios ramp up debate over how Earth got its water

By
4:46pm, December 30, 2010

Water is the life of the party on Earth. From shallow creeks to cascading waterfalls and raging rivers, it’s the primal heartbeat of the planet, nurturing a wealth of biological systems from the very simple to the amazingly complex. But no one knows for sure how Earth got this most precious of fluids.

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