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TIL Rotationplasty is a surgical procedure where, in case of bone tumor, they remove a child's lower leg, rotate it 180 degree and attach it to a thigh bone in a way that makes an ankle joint serve as a "new knee". It looks like having one leg shorter and rotated back.

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WkQA8 TIL Washington Redskins' owner Dan Snyder once cut down trees along the Potomac River so that he could see it from his house. The trees were located in a national park, and a ranger who raised concern about the issue was raided by US Marshals.....
N7BYQ TIL There is a monument in Kyoto Japan called the Ear Mound. It consists of Ears and Noses of Chinese and Koreans killed by the Japanese in the late 1500's. Its estimated there are 38,000 Korean noses in this Ear Mound memorial.
EgERV TIL the Heat Index (aka "feels-like" temperature) is only accurate for healthy and well-hydrated adults of average size and weight who are sitting in the shade with a breeze of 5 knots. These and other assumptions are parameterized as constants in the formula and any deviations result in inaccuracy.
B4jb TIL Russians don’t smile as often because for them a smile is the sign of personal sympathy, but not politeness
4XBA5 TIL about Taarof, Iranian etiquette in which the host offers anything to the guest and the guest declines it repeatedly until eventually giving in, regardless of whether they want it or not. Taxi drivers might refuse payment initially as passengers are meant to insist on paying.