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TIL that in the history of AI research there's a time period called as AI winter, it is a period of reduced funding and interest in artificial intelligence research. A few scientists survived that. And currently we're in the AI spring, where AI is doing wonders.

awb70 Today I learned that the battle at Castle Itter during WW2 wasn't the only time that Americans and Germans fought alongside each other in battle.
7r67O TIL: Despite the widely-held belief that ICEE created the Blue Raspberry flavor in the early 1970's, there's record of the Gold Medal company, which made Sno-Kones, using the flavor as early as 1958 for their cotton candy.
16Qkd TIL about the "Bell Island Boom." In 1978, a mysterious and extremely loud explosion occurred in Bell Island, Canada. The blast was audible from up to 100km away, and the energy released was so powerful that the Vela Satelites used by the US Govt to detect nuclear explosions, detected the event.
6EZVW TIL in 1985, MTV ran a contest based on John Mellencamp's song Pink Houses, where they gave away a pink house. Unfortunately, the house was on a toxic waste dump in Indiana. Not wanting to poison his fans, they were forced to buy another house. Also included was a garage full of Hawaiian Punch.
7rXab TIL there is a cavernous 40-foot tall basement underneath the Lincoln Memorial excavated during its construction. At one point it was open to the public, before being closed after asbestos was found by a tourist. As recently as 2017, it was proposed the basement should be converted to a museum.