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TIL Algae produces most of the world’s oxygen

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5XKD TIL in 1954, archaeologists excavating an 8th-century Viking settlement in Sweden found a Buddha statuette from India
ExVX TIL that all cats with 3 or more colors are females
Z8PLD TIL In Lilo and Sitch (2002), Stitch is called 'Experiment 626' because he is his creator's 626th experiment. In an episode of the Lilo and Stitch TV series, they meet 'Experiment 420', who is green and has the power to make food taste better.
rNbN4 TIL of Lieutenant Alonzo Cushing, who held back a Confederate attack with his artillery during the Battle of Gettysburg. His abdomen was ripped open by shrapnel, but he held in his intestines with his arm and continued directing fire until he died. He was awarded the Medal of Honor 151 years later.
Z8KpD TIL About polymer banknotes, and how they're in general circulation in at least 30 countries. They were first developed in Australia to replace paper banknotes with a more secure and more durable alternative.