(via BoingBoing) In the third installment of what appears to be an ongoing series called "Apollo Chronicles" on Nasa.com, comes an article entitled The Smell of Moondust:

Schmitt says, "All of the Apollo astronauts were used to handling guns." So when they said 'moondust smells like burnt gunpowder,' they knew what they were talking about.

This is news to me, but don't think for a second that it won't turn up in a story of mine, sooner or later.