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TIL in 2018, United Airlines switched to lighter paper for their inflight magazines, it saved 1oz per copy which after 1 year saved 170,000 gallons (643,000 L) of fuel worth $290,000.

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0wLx1 TIL, Saint Edith Stein was a Jewish convert to Roman Catholicism. In 1942, she became a prisoner of the Nazis. A dutch official offered her escape from Auschwitz but she refused, preferring to "share in the fate of her brothers and sisters".
wL0wE TIL that the national meteorological service of Italy is one of the last national meteorological service which is still within the armed forces
neQdW TIL that in two of the 145 instances of homicide recorded in the London eyre court rolls of 1278, two of these resulted over quarrels breaking out after a game of chess.
e5AE TIL the presence of eyebrows is more important for facial recognition than the presence of eyes.
yQmkV TIL not only does the Aztec word that became avocado mean “testicle” (because it grows in pairs), but the fruit was apparently adapted for megafauna like mammoths and giant sloths who would eat it and poop out its unusually large seed in distant locations.