Moon cave that could shelter astronauts found beneath the Sea of Tranquility
By Ashley Strickland, CNN (CNN) — As the full moon shines in the night sky this weekend, take a moment to revel in its beauty and search for a large, dark plain. The surface feature is Mare Tranquillitatis, or the Sea of Tranquility, where the Apollo 11 mission landed on the afternoon of July 20,
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