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TIL the deployment of radar in WWII ($3B) cost about 50% more than the development of the atomic bomb in the Manhattan Project ($2B). Just prior to entering WWII, only 20% of the US Navy's 400 warships were outfitted with radar. Within 4 years, the navy had over 2,000 warships & every one had radar.

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VBg00 TIL about Mystery Date, a board game from Milton Bradley released in 1965 and reissued in 1970, 1999, and 2005. In the 1999 version of the game, future Captain America actor Chris Evans plays the role of Tyler, the "beach" date.
GYmXE TIL Valerian Rybar, an American interior designer, lined the walls of his dining room with 400 bound leather books, all fake, but with titles relating to various chapters of his life. One, entitled "International Boredom", allegedly alluded to his ex wife.
vEJ7 TIL James Gandolfini bought 450 watches — 40 of which made of gold — for the cast and crew of The Sopranos at the end of the serie. Total retail value: 2 million USD.
R7O8 TIL that on August 4, 1922, all telephone service in the United States and Canada was suspended for one minute during the funeral of Alexander Graham Bell.
Z8nbp TIL Bilingual reduced emotional resonance is a fairly well-established phenomenon were many bilinguals report “feeling less” in their second language, which might make it easier to use highly emotional vocabulary, and swear.