How Do You Preserve History On The Moon?

Astronaut Buzz Aldrin walks on the moon during the Apollo 11 mission in 1969. The landing site at Tranquility Base has remained mostly untouched — though that could change as more nations and even commercial companies start to explore the moon.

As the 50th anniversary of the Apollo 11 lunar landing nears, some say the site of the first footprints on the moon should be protected. But historic preservation off our planet is unprecedented.

(Image credit: NASA)