Our sense of smell is believed to affect 75% of our daily emotions. The close connection between the olfactory gland, which registers smell, and the limbic system, that governs emotion and memories, is the power behind our sense of smell.
Scent receptors in the nose connect directly to the section of the brain that is responsible for memory and emotion. This is why a smell has the ability to transport you to a certain time and place, linking back to a particular memory or feeling.
Humans are able to recognize approximately 10,000 different odors, and what’s more remarkable, we are able to recall smells with 65% accuracy after a year, in contrast to only 50% of visuals after three months. (Sense of Smell Institute)