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TIL The Tomb of the Unknowns has been continuously guarded without interruption since 1937. There are wear marks in the marble from the sentinels footsteps

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R7jv8 TIL As a defensive measure Israel installed an underwater pipe system to pump flammable crude oil into the Suez Canal, thereby creating a sheet of flame. On the eve of the Yom Kippur War, teams of Egyptian frogmen blocked the underwater openings with concrete before launching their attack
RxZw TIL Alexandra David-Neel disguised herself as a beggar and crossed a frozen, 19,000ft mtn pass in winter to get into Lhasa, witnessed murders and battles, had to barter for passage with warlords, crossed Mongolia and the Gobi desert, became incredibly ill, and boiled her boots to avoid starvation
Z8e9R TIL about Project Cirrus. The USA's attempt to stop a hurricane by dropping 180lbs of dry ice into.
e0YQJ TIL that the Manchurian plague outbreak of 1910-11 was incredibly deadly, with a near-100% fatality rate, and marked the first time that PPE including cloth masks were used on a significant scale to contain an epidemic
LQkGZ TIL In 1930 Thomas Edison was at the controls for the first departure of a regular-service electric multiple unit train from the Hoboken Terminal to Montclair New Jersey!