Alan Shepard found the rock 14321 (arrowed) in Feb. 1971 in which a group of scientists found a possible fragment of Earth rock at least 4 billion years old. Big Bertha weighs about 20 pounds (9 kg) and is 9 inches (23 cm) wide. On the moon it weighed 3.3 pounds. NASA
It was bound to happen. 355 named and classified moon rocks have already been discovered on Earth. Now it seems scientists have found an Earth rock on the moon! A team of planetary scientists with the Center for Lunar Science and Exploration (CLSE) recently announced their discovery of a possible piece of our planet in a rock brought home by the Apollo 14 astronauts in 1971.
Lunar rock 14321 is pictured here back on Earth. Most of the Apollo moon rocks are stored at the Lunar Sample Laboratory Facility in Houston. Lunar and Planetary Institute
Meteorites slam into the moon just like they do on Earth. Sometimes they even get incorporated into the local rock. Using a new technique for distinguishing between impactors and native rock, the team examined a bits of a 2-gram fragment that had been sawn off a rock officially named 14321 — nicknamed Big ...