America’s most daring, extraordinary feat, landing astronauts on the moon, remains the pinnacle of achievement by anyone anywhere. NASA put 12 men on the lunar surface more than half a century ago, beginning with Apollo 11’s Neil Armstrong and Buzz Aldrin. The two became the first humans to explore another world when their lander, bearing the patriotic name Eagle, settled onto the Sea of Tranquility on July 20, 1969. At 23 feet, the Apollo lunar module stood a little taller than a giraffe. Five more Apollo moon landings followed, each one leaving behind a descent stage. They will remain there for all time.