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TIL We Used To Sleep In Two Segments Every Night Until Electricity Was Invented

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OoxEL TIL "All animals, including vertebrates (mammals, birds, reptiles, and fish) and invertebrates (sea urchins, leeches, mussels, nematodes, and others) have been found to have endocannabinoid systems."
Eg68V TIL the original version of “Washington Crossing the Delaware,” one of the most famous paintings in American history, was destroyed by an Allied bombing raid while on display in Bremen during WWII.
oBaoA TIL of Shoichi Yokoi, a sergeant in the Japanese Army during WW2. He went into hiding after the Battle of Guam, living in the jungle with several others for 28 years, though he was alone for the remaining 8 years. After his capture he returned to Japan, married and became a popular TV personality.
Egg40 TIL that all ships of the Royal Australian Navy are marked with a large red kangaroo. This tradition came about after Australian warships were frequently confused with British vessels
lKo1 TIL researchers trained flatworms, then decapitated them. After their heads grew back, researchers found they had retained their training.