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TIL what causes old people smell. As our skin matures, its natural antioxidant protection declines resulting in greater oxidation of lipid acid. When lipid acid is oxidized, the chemical compound nonenal is produced, which gives off that old people smell.

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xgpD TIL that the idiom “You kids get off my lawn” was ascribed to elderly first-generation homeowners who prided their lawns as a symbol of new-found affluence post WWII
W7daX TIL printers embed tracking codes as hidden yellow dots on pages, revealing who printed what and when
xVBKD TIL During the Cold War, US Secretary of State John Foster Dulles asked Indian Prime Minister Nehru “Are you with us or against us?”, Nehru replied “Yes”.
AlLn TIL Al Capone earned $105m per year in the Prohibition era from alcohol and rackets. This today would be equivalent to $1.4b per year.
JYe71 TIL that in approximately 8000 BC, the Mesopotamians began using clay tokens to count their agricultural and manufactured goods. Later they began placing these tokens inside large, hollow clay containers (bulla, or globular envelopes) which were then sealed.