50 years ago, during Apollo 15's second EVA on the Moon's surface, astronauts Dave Scott and Jim Irwin found what came to be known as the "Genesis Rock." Per Wikipedia: "The rock was formed in the early stages of the Solar System, at least 4 billion years ago. It was originally thought they had found a piece of the Moon's primordial crust, but later analysis initially showed that the rock was only 4.1 ± 0.1 billion years old, which is younger than the Moon itself, and was formed after the Moon's