 This might provide a leg up in establishing bases on the moon. That's one small step for man. Not far from where Neil Armstrong and Buzz Aldrin landed 55 years ago, scientists have found a cave. And they think there are probably hundreds more that could be used to house future astronauts. The cave believed to have been formed by lava from a moon volcano. The lead researcher on NASA's Lunar Reconnaissance Orbiter team says they always thought moon caves existed. To actually prove their existence is exciting.