‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
2% of Europeans lack the genes for smelly armpits.
6
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Children's sense of smell is better than adults'.
860