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TIL that almost 10% of modern Mongolians are descended from Genghis Khan

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kOx67 TIL that the oldest genetic proof of malaria was found in King Tutankhamun’s body. He had more than one strain of malaria, indicating that he had multiple infections throughout his life. The strains belonged to the most virulent and deadly form of the disease.
QNW6a TIL the first mac & cheese recipe dates to the year 1390, when it appeared in the cookbook "The Forme of Cury". It used fresh, hand-cut pasta sandwiched between a mixture of melted butter and grated cheese.
0wE61 TIL that the Texas School Book Depository building, from where Lee Harvey Oswald shot and killed President of the United States John F. Kennedy, was slated for demolition prior to the assassination, but was then preserved to investigate the murder, and is now a museum and National Historic Landmark
QNaya TIL that American-born Soviet Spy Joel Barr successfully convinced Khrushchev to build a city devoted to making semiconductors. It’s called Zelenograd and it still exists.
nWN17 TIL Rotational detonation engines are expected to replace rocket engines for space flight.