Copper + Nitric Acid + Water.
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"Good houses, well-maintained courtyard for Socialist Moscow! " by M.A. Nesterov-Berzin. USSR, 1947 year
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What happens if you fly against the wind at wind speed
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Freedom of opinion and expression
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75 American prisoners-of-war near Masan, South Korea who's been murdered by the North Korean forces. 1950
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Horse Diving Sport in 1923
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Mahatma Gandhi (right) with his eldest brother Laxmidas in 1886.
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Albert Einstein moved to the United States on October 17, 1933. Two weeks later, Halloween arrived. When a group of kids knocked on his door that evening and shouted 'Trick or Treat,' Einstein came to the front porch and played the violin for them
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Most populous capitals in 2022 and 1922
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The most expensive corporations of this millennium
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This is how tennis balls are made
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Watermelon popcorn