The American flag is bleached white. But some of the boot prints could remain undisturbed for tens of thousands of years.
About 4.5 billion years ago, according to the most popular theory of the moon’s formation, a mysterious rocky world the size of Mars slammed into Earth. From the fiery impact, shards swirled and fused into a new, airless world, itself bombarded with rocky objects. In the absence of the smoothing touch of weather and tectonic activity, every dent remained. And then, one day, among craters both microscopic and miles-wide, two guys came along and stepped on the surface, carving new hollows with their boots.
Buzz Aldrin, seeing the moon from the surface for the first time, described it as “magnificent desolation.”
It was not so desolate when they departed. The Apollo 11 astronauts discarded gadgets, tools, and the clothesline contraption that moved boxes of lunar samples, one by one, from the surface into the module. They left behind commemorative objects—that resplendent American flag, mission patches and medals honoring fallen astronauts and cosmonauts, a coin-size silicon disk bearing goodwill messages from the world leaders of planet Earth. And they dumped things that weren’t really advertised to the public, for understandable reasons, such as defecation-collection devices. (Some scientists, curious to examine how gut microbes fare in low gravity, even proposed going back for these.)