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TIL that Stephen Wolfram dropped out of Eton because of boredom. He went to Oxford, but again dropped out. He went to Caltech, and received a PhD in particle physics at the age of 20.

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LQ16P TIL Dr. William Halstead, who is considered the father of modern surgery due to his research in multiple surgical fields such as antisepsis to prevent infection, developed addictions to both cocaine and morphine during his career, due to experimenting with the drugs' numbing abilities on himself
v1Kv4 Til: When the permanent tooth starts growing out of the gums, the new tooth breaks down the roots of the baby tooth, causing it to loosen and fall out. That is why there is no root on a fallen out baby tooth.
oWrE TIL the A-10 “Warthog” is designed to fly with one engine, one tail, one elevator, and half of one wing missing.
4RRb TIL during the Cuban missile crisis a Soviet Submarine came under attack from depth charges, the captain assumed WW3 had started and prepared to launch a nuclear weapon, his executive officer overruled him. It turned out the depth charges were training rounds being used to signal them to surface.
W71g8 TIL that in 1978, anti-apartheid activist Donald Woods became the first private citizen to speak before the United Nations Security Council.