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TIL about the Paradox of tolerance. It states that if a society is tolerant without limit, its ability to be tolerant is eventually destroyed by the intolerant.In order to maintain a tolerant society, the society must be intolerant of intolerance

woOgY TIL that the Pop-It bubble popper was originally invented in 1975 by Theo and Ora Coster of Theora Concepts: a married Israeli couple who had invented many games including Guess Who? and Zingo!. Incidentally, Theo was a former classmate of Anne Frank.
x6485 TIL that in 1996 a man named Blair Adams withdrew most of his money and fled Canada after allegedly telling friends someone was trying to kill him. He was found murdered six days later, in a parking lot 2150 miles away. His murder remains unsolved.
VMJvZ TIL the Vietnam War is the only war in American history in which US war dogs were not allowed to officially return home after the war. Classified as expendable equipment, around 3500 dogs who were not killed in action were either euthanised or left behind.
1aNQX TIL that Pluto is so cold that it's covered in frozen Nitrogen ice. About 800,000 years ago, it may have been warm enough to have liquid Nitrogen flowing across its surface in lakes and rivers.
QJOda TIL that Mount Etna's summit is the only point on Earth save for the South Pole where more than 10 territories meet, 11 do: the towns of Adrano, Biancavilla, Belpasso, Castiglione di Sicilia, Maletto, Nicolosi, Randazzo, Sant'Alfio, Zafferana Etnea and Bronte, which touches the summit from 2 sides.