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Forty years in the past, humanity left its final footprints on the floor of one other celestial physique. Apollo 17 astronauts Gene Cernan and Harrison ‘Jack’ Schmitt guided their lunar module Challenger down into a stupendous, mountain-ringed valley within the Taurus Mountains, on the sting of the Moon’s Serenitatis basin, simply south of the traditional crater Littrow. The spectacular …
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