I Smell Something

The Nose Knows
Did you know that the ability to smell is the first of the five human senses to begin working?
In the Time-Life book, The Mysteries of the Human Body, there are these other olfactory notes:
"From birth, females have a better sense of smell than males, an equality that persists for life."
The ability to smell improves until middle age and declines steadily after that.
Half of people over age 80 have lost their ability to smell.
Unlike the retina in the eye or the vital hair cells in the inner ear, olfactory nerves constantly regenerate; they live about a month and are replaced from the nasal lining.