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TIL an actor in Nazi Germany lost his job for being Jewish. He went to the Alps, grew a beard, and dyed all his hair by bathing in diluted hydrogen. He returned to the stage claiming to be a self-taught peasant actor and was praised by the Nazis as "proof of the superiority of Aryan blood."

P1krg TIL on November 23, 1991, Freddy Mercury released a statement that he had A.I.D.S. and would grant no interviews. He died 24 hours later. He was 45.
P1knZ TIL In 1990, over 100,000 people visited San Luis Obispo during the Cal Poly Poly Royal event. A full scale riot broke out both in town and at the college when several thousand students and visitors began throwing bottles and rocks at police, flipping cars and various other destructive activities.
BGDd TIL The Roman Colosseum had 28 lifts which hoisted animals 24 ft up, then cage lids and trap doors in the arena floor opened simultaneously, unleashing beasts to fight each other or men. A lift was remade last June, ridden by a wolf who received a biscuit when released into the Colosseum.
neNG9 TIL scientists created a Transparent aluminium-like material as shown in Star Trek IV: The Voyage Home. It is a hard, glass-like magnesium aluminate that has visible and IR transmission. Military applications include lightweight bullet proof glass, armor and lasers.
gMNR8 TIL The German candy "Werther's Original", was purposefully marketed in the 1990s as being a candy that grandparents would give to their grandchildren.