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TIL Tesla was able to perform integral calculus in his head, which prompted his teachers to believe that he was cheating.

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p1Qb TIL That a Russian scientist selectively bred foxes that tolerated human contact and after 40 generations had animals that were not only friendly to humans but were different from wild foxes in numerous other ways as a result
JYDpl TIL A WWI soldier injured in France in 1917, went on to marry the nurse that mistook him for a German spy and advised surgeons to take his life on the operating table. He accidentally spoke German to doctors while under a fever, and she took it as spy language. They were married for over 50 years.
wLYPE TIL a coin left at the grave site of a U.S. veteran is meant as a message to the deceased soldier's family that someone has visited the grave to pay respect. Leaving a penny means you visited, a nickle means you trained at boot camp together and a dime means you served together in some capacity.
LkKYr TIL: Ustad, or T-24, a wild tiger labelled a man-eater for supposedly killing four men in nine years. Due to his aggressive nature, attributed to multiple sedations for medical concerns, he was placed in captivity to the dismay of many. He is the only tiger ever featured on India Today's cover.
695jW TIL the Unicode standard officially supports the penis symbol as an Egyptian hieroglyph