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TIL Hershey’s Kisses got its name from the machine that makes them, which makes kissing sounds and appears to “kiss” the conveyor belt onto which the chocolate is dispensed.

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7DXM TIL A civilian guard was first posted at the Tomb of the Unknown Soldier in 1925 in part to stop families from picnicking on the flat marble slab with views of the city. A military guard was first posted in 1926.
dxJ9 TIL that in the War of 1812, the 93rd Highlanders regiment were halted within range of the enemy. The commanding officer was killed and with no orders to advance or retreat, the column held fast and took concentrated American fire. This continued until another general ordered their withdrawal.
AD79n TIL about The Hyena Man. He started feeding them to keep them away from livestock, only to gain their trust and be led to their den and meet some of the cubs.
PYoAE TIL: In a room at Microsoft's headquarters in Redmond all sound from the outside world is locked out. It's called an "anechoic" chamber, because it creates no echo at all. The background noise is so low that it approaches the lowest threshold theorized by mathematicians - next step is vacuum.
Dx9V TIL illegal prime numbers exist. An illegal prime is a prime number that represents information which is forbidden to possess or distribute. For example: when interpreted in a particular way, a certain prime describes a computer program that bypasses the digital rights management scheme used on DVDs