Moon's rough 'wrinkles' reveal clues to its past

(PhysOrg.com) -- Written on the moon's weary face are the damages it has endured for the past 4-1/2 billion years. From impact craters to the dark plains of maria left behind by volcanic eruptions, the scars are all that remain to tell the tale of what happened to the moon. But they only hint at the processes that once acted—and act today—to shape the surface.

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