In 1971, Apollo 15 astronauts found an unusual white rock on the Moon; scientists later identified the Genesis Rock as part of ancient lunar crust about 4 billion years old

Apollo 15 astronauts discovered an unusually bright rock near Spur Crater on the Moon.

This sample, known as the Genesis Rock, is an anorthosite and about four billion years old.

Scientists believe it represents a piece of the Moon's primordial crust.

Its mineral composition offers valuable clues about early lunar geological history.

This ancient sample continues to aid understanding of the Moon's evolution.