Scientists have long theorized the existence of lunar caves — underground passageways formed through volcanic processes that are connected to the pits covering the moon’s surface. Now, a team of ...

Almost 55 years after the launch of Apollo 11—the first mission to land humans on the moon—scientists have found evidence of a large cave system near the landing site of those astronauts. Using radar ...

Add Yahoo as a preferred source to see more of our stories on Google. On July 20, 1969, Apollo 11 astronaut Neil Armstrong announced his historic arrival on the ancient lava plain of Mare ...

The Mare Tranquillitatis pit as seen by NASA's Lunar Reconnaissance Orbiter. Radar data from NASA’s Lunar Reconnaissance Orbiter have revealed what they think may be the deepest known cave on the moon ...

The discovery of what looks to be the first cave on the moon – at the bottom of a lunar pit 200 feet deep – has jolted the scientific community and spurred hope it could be used as a base to protect ...

On July 20, 1969, Apollo 11 astronaut Neil Armstrong announced his historic arrival on the ancient lava plain of Mare Tranquillitatis with the following message to NASA: "Houston, Tranquility Base ...