40 years ago today, man first steps onto another celestial body, the moon. To this day, only 12 people have done this.

Apollo 40th Anniversary - NASA

Restored Video from Apollo 11 Moonwalk - NASA

Many small steps led to Apollo 11's giant leap for mankind - ArsTechnica
Forty years after Neil Armstrong and Buzz Aldrin set foot on the surface of the moon, Ars looks at what led up to this monumental occasion, and congratulates all those involved.