1. Dust is universal: It’s dry, powdery soil or any other material made up of tiny particles, whether that’s in a pile under your bed or the plume of a volcano.
2. Many mammals and birds take dust baths as part of their grooming routines or social rituals.
3. Chickens dust-bathe so devotedly that caged hens sometimes act out “sham” baths on the floors of their cages, without any dust.