1.   But if you inhale while eating, the inrush of air will blast odor molecules from your mouth toward the lungs and away from the smell sensors.

2.   Even with so many odor molecules on their palette, companies like Firmenich are under pressure to find new ones.

3.   No one knows what happens when an odor molecule meets a receptor in the nose.

4.   This prevents the scent being confused with exhaled air, and sets up a current that pulls new air across the target, launching odor molecules into the air.