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TIL that modern birds come from four distinct lineages that survived the asteroid impact.

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neoP7 TIL hurricanes, typhoons and cyclones are the same kind of storm, each name corresponding to a geographic location.
GYgAQ TIL that right before WW2, the US created the "Logan Bar," a chocolate bar that deliberately tasted "a little better than a boiled potato" as an emergency ration to prevent soldiers from snacking on it outside of emergency situations.
5VG99 TIL Part of N.Machiavelli's diplomatic mission to Cesare Borgia included sending intel back to his government, even down to Borgia's personal habits. He noticed that he had inhuman energy and could go several nights working sleepless but occasionaly would "fall to his bed" and refuse to see anyone
m0rO TIL that Richard Nixon is the only former U.S. president to refuse protection from the Secret Service after leaving office. He called the program, which provides lifetime protection to all former presidents, a waste of money.
7rdBp TIL Over a period of four centuries, the accumulated error of adding a leap day every four years amounts to about three extra days. Therefore, the Gregorian calendar drops three leap days every 400 years.