The Apollo astronaut who was ‘allergic’ to Moon dust

Astronauts being 'allergic' to Moon dust wasn't something NASA had really planned for. A member of its first group of astronauts had nearly been disqualified from the selection process for his hayfever, but was allowed to continue when he (rightly) pointed out there wasn't exactly any pollen in space. That was that, NASA thought. Or, at least, that was that until 1972, when Jack Schmitt landed on the Moon.