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107

TIL the chemical element calcium is a metal.

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m187E TIL astronomers created fake stars to improve earth's telescopes view of real stars.
N5R1 TIL that a black police officer faced charges for not investigating racial taunts against himself.
epDy6 TIL the English word 'arena' comes from the Latin word harena, which was the fine-grained sand spread on the floor to soak up gladiator blood.
R5g6w TIL about the Ariel Castro Kidnappings in Cleveland that occurred between 2002 and 2004. Three of the victims finally escaped years later in 2013, one of whom had given birth while in captivity.
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