There are footprints on the Moon, left by 12 men.
Why are they still there, undisturbed since 1972?

Question

Accepted Answer

The Moon has no atmosphere — no wind, no rain to erase them. — On Earth a footprint dies in days. On the Moon, only a slow drizzle of micrometeorites is at work — it’ll take millions of years to blur Armstrong’s boot mark.

There are footprints on the Moon, left by 12 men. Why are they still there, undisturbed since 1972?