How does dust get everywhere?

Question

You go into a room that hasn’t had folks in it for 10 years and there is dust everywhere. I thought it was skin cells but obviously not.

Even rooms with no access to the outside have dust.

In: Mathematics

Answer 1

Carpet fibres, even wall and ceiling stuff. Everything is dust if it’s small enough. You are breathing in shit you can’t see so when it falls on a surface it becomes dust!