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TIL the disco song “freak out”, was originally titled “Fuck Off”

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QNVkE TIL that Thomas Edison not only did not invent the incandescent light, but it had been around in some form for over a century before him. He improved upon inventions which has been invented gradually as early as 1705, and had been in its present form (a glass bulb powered by arc lamp) since 1802.
Mag7 TIL there is a solar power method that doesn’t involve solar panels, but rather a giant curved mirror focusing all of the light that hits it onto a single point of intersection. A water reservoir is placed where the beams of light intersect, and the resulting steam runs a generator.
7r5A7 TIL Rick Moranis and Geddy Lee attended Elementary School together.
PY7re TIL that in the early 19th-century the planet "Vulcan" was believed to actually exist in our solar system. Oddities in the orbit of Mercury led mathematicians to predict the presence of another planet closer to the sun. Later, Einstein's new theories of relativity helped disprove that hypothesis.
XpPX TIL ABBA turned down 1 billion US dollars to do a 100 concert reunion tour