What provided the final, undeniable proof regarding the formation age and history of the lunar surfaces?

Answer

Lunar rock samples returned by the Apollo missions

The Apollo missions returned physical rock samples to Earth, allowing scientists to date the formation of regions and confirm that the oldest surfaces had the highest density of large, ancient impact basins.

What provided the final, undeniable proof regarding the formation age and history of the lunar surfaces?
discoverycraterastronomytelescopeMoon