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TIL sales of Swiss Army Knives dropped by almost 40% immediately after 9/11

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yVvnl TIL that a solar storm in 1859 was so powerful that it caused telegraph lines to catch fire, and people could read newspapers at night by the aurora borealis.
OGmbX TIL of the "Click Of Death", the sound a malfunctioning floppy disk made when the disc drive was unsuccessfully trying to read it. A class action suit was filed against Iomega because their Zip drives were so prone to the malfunction, helping to make the phrase famous.
d8MnB TIL of Heart Attack Grill, a Las Vegas restaurant where people over 350 lbs. eat free. 3 people have died while eating there, and the only vegan option on their menu is cigarettes.
YKAx TIL of the corn field bomber. A fighter jet that landed itself on a cornfield after the pilot ejected from it following an unrecoverable spin. His act of ejection changed the center of gravity of the plane allowing it recover. It went back into service after minor repair work.
woE9M TIL Bach wrote a number of pieces specifically for the lautenwerck, an instrument that no longer exists as none survived the 19th century. Their strings were made of sheep guts and Bach owned two