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TIL All navel oranges originate from a single mutant tree that was planted 200 years ago. All trees that produce navel oranges were grown from cuts of the tree or mutated using grafts from the mutant tree.

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MeAaB TIL Christopher Boyce, a college drop out who despised the CIA was given high level security clearance to handle top secret CIA wires. He then sold these top level secrets to the Soviet Union through its embassy in Mexico City. The story was a top selling book and movie "The Falcon and the Snowman"
P1EVG TIL about the "Seven Sutherland Sisters", a late 19th C. sideshow act who ended up making millions by using their famously long hair to market a line of quack medicine hair growth products.
JYYwV TIL: An American dentist William James Morrison and a confectioner named John C. Wharton helped develop the cotton candy machine in 1897.
rRjQw TIL that the Japanese planned an invasion of the Philippines in 1637 to stop Spanish expansionism but they were stopped at the last minute by a Christian rebellion
4eV5 TIL that when Columbia caught their secret police agencies abusing their power and breaking the law they disbanded them.