One really staggering bit of trivia I got the other day is that people actually have four nostrils. The other two are in back, and feed odors to where they are smelled.
“Like other tetrapods, humans have two external nostrils and two additional nostrils inside the head. These internal nostrils are called “choanae” and each contains approximately 1000 strands of nasal hair. They also connect the nose to the throat, aiding in respiration.”
Wine tasters can’t really fully interpret wine until they have inhaled its odors through the back nostrils.
The sense of smell is also known to have our oldest memories, even half a century later, a memory may come back because of a unique smell.
(I used this idea to make a unique gift to a young girl, a box full of pleasant odors, each in their own vial, associated with a different part of the world. 50 different odors to smell and associate when young, so for the rest of her life, when she smelled one, it might remind her of that gift.)
Remarkable! And how can anybody say man is a random product of chance collisions of elements?