Chemistry
Why Things Smell
Volatile molecules drift through air. Locked-up molecules don't. Heat sets them free.
Bacon hits the pan. Two seconds later, someone across the house yells "MMMM BACON". Invisible? Yes. Magic? No — chemistry drifting through the air.
Concepts you just met
Volatile CompoundsAromatic MoleculesSmell ChemistryBridges to Nose