Spaces of Scent (Juhani Pallasmaa)

We need only 8 molecules of substance to trigger an impulse of smell in a nerve ending, and we can detect more than 10,000 different odours. The most persistent memory of any space is often it's smell.
"I cannot remember the appears of the door to my grandfather's farmhouse in my early childhood but I do remember the resistance of its weight and the patina of its wood surface scarred by decades of use, and I recall especially vividly the scent of home that hit my face as an invisible wall behind the door. Every dwelling has its own particular smell of home."

A particular smell makes us unknowingly re-enter a space; the nostrils awaken a forgotten image. "The nose makes the eyes remember"....