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TIL that bees dance to each other in the hive to tell each other where to find good pollen. The angle of the dance is the angle relative to the sun, the tempo of dance is the distance, the duration of dance is the quality of the pollen, and the dancer hands out free samples to whoever’s watching!

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wLgro TIL Rome imported enough olive oil that the dumping ground for the jars it was shipped in is still visible today as the 115 ft high Monte Testaccio
4kvJ6 TIL In 1834, Francois and Joseph Blanc bribed an optical semaphore operator to transmit stock market updates to them in advance of regular news. The scheme went on for two years before being discovered.
5Ygj9 TIL that until 1965, the penalty in Ireland for attempted suicide was death by hanging.
o4d7 TIL Kim Il Sung developed a calcium deposit the size of a baseball on the back of his neck. Because of it, he was only photographed from the front and citizens were jailed for mentioning it to each other.
d8DlB TIL The earliest known Fiat Currency was used by the Yuan Dynasty (1271–1368)