TheWeek recently published an article titled "The Colonization of Space", which contained the following sentence (emphasis added):
Prolonged exposure to microgravity weakens bones, atrophies muscles, and even makes facial hair flammable.
This strikes me as very unlikely. Mechanically, it makes sense that loose scalp hair floating in zero-g would be more flammable, just as aerosolized corn starch can easily burn. But, beard or mustache hair (assuming it isn't very long) wouldn't loft much in space, and so wouldn't become structurally more flammable. Instead, the implication is that the whiskers somehow becomes inherently more flame-prone.
Does this claim make any sense? Is there any backing for this idea?