A massive feature on the moon formed due to lunar rifts, in a surprise revision to earlier theories, research shows. Previously, scientists thought the moon's Ocean of Storms was a round crater left after a giant impact, but now researchers have found it is underlain by a giant rectangle created by cooling lunar lava as the moon formed. This finding reveals the early moon was far more dynamic than previously thought, scientists added. The Ocean of Storms, or Oceanus Procellarum, is the largest of the moon's maria, giant dark spots visible on the near side of the moon. Early astronomers, mistaking these features for oceans, named them maria, Latin for seas. However, they are actually giant plains of the dark rock basalt. Read more via Space.com.
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