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TIL the first known robot was created around 400-350 BC and was a steam powered “pigeon” that was able to fly about 200 meters before it ran out of steam

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xV9m5 TIL famous chemist and lifelong bachelor Robert Bunsen once proposed to a girl who said yes, but he then lost himself in his work for a few weeks. When he finally emerged from his lab, he couldn't remember if he ever proposed or not, so he did it again, only to have her turn him down.
9Yw56 TIL one gallon of horseshoe crab blood sells for $60,000 on the world market.
VMvwQ TIL that the Italian Alpini were the only army corps unbeaten in Russia during the Second World War, as stated by the Soviet Supreme Command on February 8th, 1943.
6bxw TIL a lack of toilets costs India more than $50 billion a year, mostly through premature deaths and hygiene-related diseases.
R6J1 TIL There is an estimated $60 Billion worth of treasure that is still at the bottom of the ocean.