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TIL In zero gravity, a candle's flame is round and blue.

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MxXm TIL that in England, from 17th until early 20th century, it was common for a man to sell his wife in auction, as a cheaper alternative to divorce. It would often happen in a public market, with the wife on leash.
RQa6 TIL that the Netherlands used to flood certain areas in times of war to create a military defensive line. The water was too shallow for boats, but deep enough to hide traps and ditches under.
oRrRr TIL according to Pliny, Roman Emperor Tiberius once became so enamored by the sculpture "Apoxyomenos" that he took the sculpture out of the public baths of Agrippa and into his own private bedroom. After public uproar, he placed it back into the baths out of shame.
8ybb TIL Emmy was the ship’s cat on the RMS Empress of Ireland. She never missed a voyage. However, on 28 May 1914, Emmy tried to escape the ship. The crew could not coax her aboard and the Empress left without her, which was regarded as a terrible omen. Early the next morning the Empress sank.
9Yg1G TIL The Bill Emerson Humanitarian Trust is a grain reserve of commodities and cash. In 2008 the USDA sold the remaining stocks into an all cash reserve. Since it no longer holds commodities, it can respond to local food crises outside the US, but not to a global one that affects the USA itself.