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TIL- In 1930’s all dogs in Iceland were killed to prevent the spread of worms and for years it became illegal to own one. Now you must have all your neighbours agree to let you own a dog but they can change their mind at any time.

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KO7j9 TIL: The Navy patented an 'inertial mass reduction device', an 'electromagnetic force field generator', a 'high-frequency gravitational wave generator' and a room temperature super conductor in 2019. All created by a mysterious aerospace engineer by the name of Dr. Salvatore Cezar Pais
x6kQD TIL why larger eggs have thinner shells. It's because larger eggs come from older hens and the eggs are produced with the same amount of shell material.
kOGN7 TIL The Laffer curve, a theoretical relationship between rates of taxation and resulting revenue. It assumes that no tax revenue is raised at the extreme tax rates of 0% and 100%, and that there is a tax rate that maximizes government tax revenue. The shape of the curve is disputed among economists.
8aOwb TIL: Africa has a "stonehenge" older than Stonehenge. Built "to mark the summer solstice and the arrival of the monsoons," Nabta Playa, "the oldest stone circle in the world" is among "Earth’s oldest astronomical" observatories. Over 7000 years old, it was found mostly-buried in sand in the 1970s.
xVJEk TIL San Francisco had a bubonic plague epidemic in 1900-04, but the governor ignored medical experts and denied that it existed, because he feared its impact on businesses