 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. Sherri Preston, ABC News. Sports at 25 and 55. Powered by Maximus. Moving people and technology forward.