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TIL One "horsepower" is the amount of power a horse can generate on average over an entire day and a 1 horse can actually output upto 15 horsepower.

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ploZ TIL in 1887, a mathematician received a prize for his work on the stability of the solar system. A year later, after finding an error in his own work, he published a paper contradicting it, which led to the development of chaos theory.
X0P TIL that the estimated costs for the 2012 political campaigns (6 or 7 billion) is almost 3 times the cost of sending the Rover Curiosity to Mars (2.5 billion)
oGlK TIL The Aurora Ice Hotel in Alaska was made entirely of ice. Ice walls, ceiling, beds, bar, barstools, even martini glasses were made of ice. It was closed by the fire marshall for not having smoke detectors.
bkj4 TIL In 1963, four Princeton students forced a local train to stop by parking a car on the tracks. With a gun loaded with blanks, they got on the train, picked four girls as their dates, and rode away with them on horseback.
Egel7 TIL in 1950 U.S. Senator Edwin C. Johnson’s favorite actress was Ingrid Bergman. However, when it became public knowledge that she had an affair, he introduced legislation banning all Hollywood movies starring amoral actors and actresses. Humiliated, Bergman left the country.