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TIL a significant part of the local economy of Kinmen County is making high quality chef's knives from the over 1 million artillery shells fired on the island in the 1950s. Shells filled with propaganda leaflets instead of explosives landed whole, leaving tons of high quality steel lying around.

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Zwna TIL 11,000 work-years were dedicated to the NASA inter-planetary Voyager Program through to the Neptune Encounter. This is equivalent to a third of the work estimated to complete the Great Pyramid at Giza.
O9MX TIL Rudolph the Red-Nosed Reindeer was created by retailer Montgomery Ward for a coloring book they gave away during the holiday season.
mxjmP TIL a group of Elephant is called a "Memory" and that the plural of "Elephant" is "Elephant."
9wK1D Til jimmy Stewart was a pilot in world war 2. He won numerous medals, including the Presidental Medal of Freedom and was a brigadier general.
goQ9 TIL there is a black hole 250 million light years away emitting a low B-flat 57 octaves below middle C on a piano.