“We think we experience the aroma of food when we smell it, but it’s actually a bit more complex than that. When you bite into the food, the aroma goes into the back of your throat and through a small hole up into your nose. This is called retronasal olfaction, and is actually a more powerful form of smelling than normal smelling. This is what allows you to experience the richness and nuance of food.
Brain scans reveal the experience of flavor takes up more gray matter than any other sensory experience. Additionally, the largest portion of the human genome involves the creation of your nose. So, from an evolutionary perspective, this chemical-sensing ability appears to be particularly important.”