- Smell helps us to respond to those we meet, can influence our mood, how long we stay in a room, who we talk to and who we want to see again.

- People recall smells with a 65% accuracy after a year, while the visual recall of photos sinks to about 50% after only three months.

- Olfaction is handled by the same part of the brain (the limbic system) that handles memories and emotions. Very often we cannot put a name to some odors yet they have a strong emotive association even if they cannot be specifically identified.

- Our sense of smell is capable of warning us of danger even when we sleep.

- The average human being is able to recognize approximately 10,000 different odors.