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TIL that in 1984, a British grandmother made the world's first online at-home consumer purchase using her TV remote. She was ordering groceries from the local Tesco.

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KOy9J TIL during the Operations Crossroads Nuclear Test, much of the ships surrounding the blasts were populated with test animals, many died, except for Pig #311, which was found swimming in the lagoon after the blast, and went on to live at the National Zoo in D.C.
JYx41 TIL that an uprising occurred in Romania in 1974, after they ran out of "Columbo" episodes, Peter Falk (who played the titular character) was reached out to by their government, so that the movement would quell, and he informed the people that more episodes would get made
Y7xwP TIL In the 16th century, a mysterious dancing epidemic struck Strasbourg, where people uncontrollably danced for days. This bizarre event, known as the Dancing Plague, remains a historical enigma.
w4g1 TIL in 1907 Lawrence Luellen, a Boston lawyer, was concerned about the spread of germs due to people sharing glasses and dippers in public drinking spaces. He invented the first paper cup, dubbed the Klean Cup. 5 years later he renamed it after a popular line of toys: Dixie Dolls. Thus, Dixie Cups.
KOje6 TIL about UY Scuti, the largest-known star by radius. It is 1700 times bigger than our sun, and it would take 1200 years to fly around it in a 900km/h regular passenger airplane. If Earth was in its habitable zone, it would take 10.000 years for one full rotation, each season lasting 2500 years.