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TIL Nobel Prize–winning physicist Luis Alvarez not only proved the asteroid extinction of the dinosaurs, but also worked on the Manhattan Project AND flew over Hiroshima during the atomic bombing.

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NXdrQ TIL Joseph Stalin was covered in scars from the smallpox that he’d survived at the age of seven and had official photos portray his face as smooth and fresh with well maintained hair by heavily editing and retouching photos.
6xZw TIL that to leave a social gathering without saying goodbye to anyone is called the “Irish goodbye” or the “French leave”. The French call it the “filer à l'anglaise”.
j69Gj TIL that Danionella cerebrum, a species of fish no larger than 13.5 mm and with the smallest adult volume brain of any vertebrate, is capable of producing a sound of over 140 decibels.
9mRp TIL of the “Demon Duck of Doom,” an extinct flightless bird that lived in what is now Australia. It stood over 8 ft tall, and had a skull larger than that of some horses. Despite the nickname, it was more closely related to the chicken.
X0jDP TIL: FDR's grandfather made his fortune snuggling opium into China; igniting the first war with European powers when the Emperor tried to enforce drug laws.