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TIL that during the Vietnam war, tens of thousands of desperate Americans immigrated north to Canada to escape the draft. A political response was never taken, partly because just as many Canadians hopped down south to join the American military.

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4Gvw TIL A zip bomb, also known as a zip of death or decompression bomb, is a malicious archive file designed to crash or render useless the program or system reading it. 42.zip was 42kilobytes when compressed but increased to 4.5 petabytes when decompressed.
l7jM7 TIL the Republic of Dagestan is one of the most linguistically diverse for its size administrative divisions on earth. With territory similar in size to Costa Rica, it has 14 oficial languages and between 30 and 50 native languages in total. Some are spoken in a single village.
QJ18e TIL of Richard Pavlick, a retired postal worker who slipped past the Secret Service on a mission to assassinate president-elect JFK in 1960. Pavlick decided not to attempt the assassination because he did not wish to harm Kennedy's wife and children.
m1ZJM TIL that the Marquis of Queensbury once told Oscar Wilde "If I catch you and my son again in any public restaurant I will thrash you". Wilde responded: "I don't know what the Queensberry rules are, but the Oscar Wilde rule is to shoot on sight".
R7W77 TIL NASA pioneered research for Postural Orthostatic Tachycardia Syndrome (POTS)/Orthostatic Intolerance (OI) and developed therapeutic exercise programs for them for astronauts returning from space.