Theory: Photic Sneezing (the phenotype where a person sneezes when exposed to a bright light, very common) evolved as a hasty adaptation to indoor cooking or indoor fires, clearing the lungs only when the human leaves the polluted environment. The newest adaptations will tend to be the roughest, I’m guessing it arose only in the past 500k years or so as a response to artificial dwellings and fire use.
Theory: Photic Sneezing (the phenotype where a person sneezes when exposed to a bright light, very common) evolved as a hasty adaptation to indoor cooking or indoor fires, clearing the lungs only when the human leaves the polluted environment.
The newest adaptations will tend to be the roughest, I’m guessing it arose only in the past 500k years or so as a response to artificial dwellings and fire use.