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

• During their mission, they spotted an unusually bright fragment near Spur Crater, a small feature on the slope of Hadley Delta.
• The white rock immediately stood out against the darker lunar soil, and what looked like an ordinary piece of rock soon became one of the most famous samples returned from the Moon.