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TIL the style of moustache worn by Hitler was called "The Toothbrush." It was made popular by Charlie Chaplin.

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ANg6x TIL Jelly has traditionally been savory. The oldest known meat jelly recipe is from the 10th-century cook book Kitab al-Tabikh and ingredients include boiled fish heads, vinegar, and whole onions. Jelly containing fruits would come later.
oR4er TIL the term sensory-specific satiety, which is where your body can get “full” of one specific type of food but then get a renewed appetite for another type. The concept explains why you can finish a big meal and not be hungry anymore, but then happily eat dessert.
D1NQp TIL Concorde flew so high passengers received twice the dose of radiation from flying in a conventional aircraft, which was believed to increase cancer risk. The flight deck contained a radiometer so they could descend in case of a solar storm.
R7P04 TIL that Michelson-Morley experiments (to prove a theory competing with special relativity) are still being conducted, with the first one dating back to 1881
p8L8G TIL there were more first responders that died due to illnesses linked to 9/11 than those that died on the day of the attacks.