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TIL black holes aren't totally black, as energy is released to compensate for mass that enters the black hole, and this faint glow is called Hawking radiation after Stephen Hawking, who figured it out

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E1bEP TIL that A&W introduced a 1/3 lb burger which was cheaper and preferred in taste tastes to McDonalds 1/4 pounder. It failed as the American public thought the 3 in the name made it smaller than the McDonalds product.
DQnPr TIL Vincent van Gogh had a known habit of sucking on his brushes to swap colors. It is widely believed that the lead poisoning partly led to his severe mental decline, resulting in his famously cutting off his ear, and ultimately shooting himself in the chest.
VBWwk TIL Mount Saint Elias is both the second tallest mountain in the United States and the second tallest mountain in Canada.
6ERKw TIL that the first Spearmint Rhino strip clubs were converted from a chain of children's restaurants called the Peppermint Elephant.
4XDyg TIL as early as 839 AD, Swedes & Scandanavians served as mercenaries in the Byzantine army. Swedish men left to enlist in such numbers that a new law "Västgötalagen" was created that said no one could inherit while staying in Greece to stop emigration.