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TIL Treehouse attachment bolts are specialized bolts engineered for treehouse construction. Since treehouses are subject to frequent load reversal produced by winds, TABs must be made of spring steel. The bolts are able to support from between 9,000 and 12,000 pounds

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MeZpm TIL that the popular children's song "Do Your Ears Hang Low" stemmed from a song sung by soldiers marching in the American Revolutionary War. In their version, however, the listener is hit with intrusive questions regarding their ball sack. NSFW lyrics in link
0wL6M TIL Audie Murphy, the most decorated American soldier of World War II, suffered from battle fatigue for the rest of his life. He endured chronic insomnia and recurring nightmares, and kept a loaded pistol under his pillow. He eventually took to sleeping alone in his garage with the lights on.
oBboA TIL about Operation Mincemeat during WW2 where the British dressed up a dead body as a royal marine and placed on his person misleading evidence that the allies would invade Greece, not Sicily. The body was found by the Germans, who rerouted their resources, and the allies attacked and won Sicily
8eOEb TIL in New York City, 111 8th Ave takes over one city block (2.9 mil square ft), it was originally built for the Port Authority of NY and NJ. Google owns the entire building since 2010.
4wp6 TIL that the Slurpee was invented by accident at a Dairy Queen. The owner, Omar Knedlik, didn’t have a soda fountain and so kept them cool in his freezer. He left them in too long, but served them to customers anyway. They loved it.