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103

TIL that the submarine USS Tang was sunk by its own torpedo.

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GYBxQ TIL That Shel Silverstein wrote a book called "Uncle Shelby's ABZ Book" a parody of his other books with a more adult twist. It encouraged kids to do bad things such as give daddy a haircut, Throw eggs at the ceiling, or put sugar in the gas tank through Shel's 'light-hearted' writing style.
D1vmY TIL that a Russian Defector (GRU officer Stanislav Lunev) has alleged that small nuclear weapons have been secretly pre-positioned in the U.S. to be used for sabotage by Russia′s agents in the event of a nuclear war.
4kNkN TIL of camoflauge trees: WWI-era hollow, fake trees placed in no man's land to spy on enemy trenches
7r9xx TIL that in the 1997 UK general election the Liberal Democrats won the Winchester constituency by 2 votes. The Conservative incumbent legally challenged the result and secured a re-run of the election. The second time he lost by 21,556 votes!
5Y7ap TIL that blue whale's heart beats at 8/10 bpm and is about 1.5 meters long, 1 meters wide, and 1.5 meters tall. It weighs about 180 kg and its heartbeat can be heard from over 2 miles away