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TIL During WW2 the USA developed grenades to match the size and weight of a baseball so that any young American man could throw a grenade with accuracy and distance.

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Wk1X TIL before the Hubble Space Telescope was launched scientists were convinced the Universe was no longer expanding. Not only is the Universe still expanding but at a rate of 74 kilometers (48 miles) per second.
E1bXX TIL the flavoring in the bitter Coca Cola beverage Beverly comes from grapefruit rind
GYAbQ TIL Nuclear Semiotics investigates methods to inform earthlings of the far future to avoid nuclear waste sites; ideas include color-changing cats, an atomic priesthood, and a Rosetta Stone-type message
DjNg TIL The Sword in the Stone and Excalibur are two different swords
mxJMo TIL in Finland, fines are based on income. In 2002, a Nokia executive was fined with a US$103,000 speeding ticket.