Maria Mystery: Why Moon's Far Side Has No 'Face'

Heat radiating from the young Earth could help solve the more than 50-year-old mystery of why the far side of the moon, which faces away from Earth, lacks the dark, vast expanses of volcanic rock that define the face of the Man in the Moon as seen from Earth, researchers say.

Published On 06/16/2014
11:35 AM EDT
The Apollo astronauts only explored the moon's near-side. No human has ever set foot in the lunar highlands on its far side. | NASA