The woman, named Joy Milne, can smell Parkinson’s. In one test, she was given 12 t-shirts, 6 from those who have Parkinson’s and 6 from those without. She identified 11 of them but was adamant that one control subject had Parkinson’s. 8 months later that subject was diagnosed with Parkinson’s.
Violets can be smelled for only a few moments at a time because they get their scent from ionine which shuts the smell receptors off after simulating them. After a few breaths the scent pops up again but the brain registers it as a new stimulus. So every time you smell a violet is a first time.
The smell given off by books can be used to tell the age of the books, and how close the books are to degradation.
A woman correctly detected 11 out of 12 subjects in a Parkinson’s study using her sense of smell. 8 months later the one extra she believed had Parkinson’s was diagnosed with the disease making her 12/12.
The metallic smell of money is actually your body oils breaking down in the presence of iron or copper. You can see this by using a paper towel to pick up a penny smelling it – no odor. Then rub your sweaty/oily fingers on it and notice the strong metallic odor. Money doesn’t smell, you do.
There is a guy who smells everything before it goes into space with the astronauts to protect them from toxic and obnoxious odors
The Aroma of Tacoma is a putrid odor associated with Tacoma, Washington. The smell has been described as similar to the odor of rotten eggs. A variety of causes have been attributed to the Aroma of Tacoma, including sediment in Commencement Bay, sulfur released from the Simpson Tacoma Kraft pulp and paper mill, arsenic from a closed copper smelter, traffic congestion, or a combination of all of these factors.
We have a good idea of what other planets would smell like based on their atmospheric composition. Venus and Mars would smell like rotten eggs, while Uranus is odorless.
‘Old person smell’ is actually caused by the chemical 2-nonenal. Older people secrete this chemical through their skin at a much higher rate than younger people.
Human poop and farts get their foul smell from the chemical compounds Skatole and Indole (among others). At low concentrations, these compounds smell flowery, and are used in perfumes. USA and Israel have used Skatole in crowd control sprays—the stench does not wash off skin for 3 days.