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TIL: In 1986 the US refitted Chinese J-8 interceptors with US avionics

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x6Kd1 TIL that the new MacBook trackpads don't physically make a click sound or move down. Rather, it's computer-generated.
xVwKb TIL The Pied Piper Fairy Tale may have been inspired by an actual historical event. Inscription: “on the 26th of June ... 130 children – born in Hamelin – were led out of the town by a piper wearing multicoloured clothes. After passing the Calvary near the Koppenberg they disappeared forever."
nYO9 TIL the world’s fastest camera records at 4.4trillion frames per second at a resolution of 450x450 and is capable of recording individual photons.
Eg5M0 TIL between 1908 and 1940, it was possible to buy a house in the Sears Catalogue. The materials needed for building the house would be delivered, with assembly required on site. Over 70,000 homes were built this way.
5VyyR TIL: Harvard College and Harvard University are both accurate names (but not interchangeable); the former is the undergraduate program and the latter is the grad schools