The Big Thirst

The Big Thirst

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The water coming out of your kitchen tap is four billion years old and might well have been sipped by a Tyrannosaurus rex. Rather than only three states of water—liquid, ice, and vapor—there is a fourth, “molecular water,” fused into rock 400 miles deep in the Earth, and that’s where most of the planet’s water is found. Unlike most precious resources, water cannot be used up; it can always be made clean enough again to drink—indeed, water can be made… (more)