Secrets of the Moon’s Permanent Shadows Are Coming to Light

On the eve of this new era of moon landings, a slew of fresh studies of PSRs have revealed that these shadowed regions are even stranger than scientists imagined. What will we find lurking in the shadows?

“I don’t know what we’re going to see,” said Robinson, the lead scientist for next year’s robotic mission. “That’s the coolest thing.”

Water, Water, Everywhere

Speculation about PSRs dates back to 1952, when the American chemist Harold Urey first hypothesized their existence on the moon. “Near its poles there may be depressions on which the sun never shines,” he wrote. He observed that, whereas Earth orbits the

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