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TIL Penicillin is an accidental discovery. Fleming returned from a two-week vacation to find that a mold had developed on an accidentally contaminated staphylococcus culture plate. Upon examination of the mold, he noticed that the culture prevented the growth of staphylococci.

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oBWv7 TIL the term “Suspension of disbelief,” defined as a "willingness to suspend one's critical faculties . . . for the sake of enjoyment" refers to one of Aristotle’s principles of theater in which the audience accepts fiction as reality so as to experience a catharsis.
ADX0o TIL that a German carpenter named Georg Elser attempted to assassinate Hitler in November 1939, only one month into WWII. His bomb, hidden at a speech venue, went off successfully but failed to kill Hitler, who had finished his speech and left early.
nrpd TIL September 16th is the shortest day of the year. 24 hours − 21.3 seconds
X05jP TIL The first case of a DUI was a London Cabbie named George Smith who was swerving all over the place on September 10th, 1897 shortly after midnight. He was fined 20 schillings and told to be more careful next time.
0blL TIL antimatter is the most expensive substance on Earth at $62.5 trillion per gram