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TIL about the largest known structure in the observable universe - Hercules–Corona Borealis Great Wall. It's approximately 10 billion light years in length, more than double the previous record holder, or 9.3% of the observable universe's diameter.

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PDZn TIL The Office had a spin-off series called “The Office: The Accountants” about the accounting department trying to find a missing $3000 in the budget. It had 10 episodes and was available only online.
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5Yr0P TIL of the amazing life of Josiah Henson, who walked 900 miles, with his wife and children, to escape slavery. He founded a colony in Canada and helped 118 others to freedom, and was the inspiration for the book "Uncle Tom's Cabin"
j684R TIL Leonhard Euler wrote 234 letters to 15 year old German Princess Friederike Charlotte over a period of two years in order to teach her math, physics, and sciences. These letters were later reprinted as a textbook for "every female academy in the kingdom"
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