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TIL the earliest known recording of a human voice was made in 1860 by dragging a stylus over soot-colored paper. The recording was made for visual purposes only and was not played back until 2008.

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vPNgx TIL that because of its strategic importance and impregnable position during the Napoleonic Wars, the Diamond Rock, off the coast of Martinique, was considered a warship by the British Admiralty, which conferred on it the title of HMS Diamond Rock, turning the rock into a stone frigate.
lpA1 TIL it costs $228,288 an hour to operate Air Force One.
YpPxG TIL Minnesota Has Been Refusing to Return a Captured Confederate Flag to Virginia for More Than a Century
gMBZ4 TIL at age 17, Brock Lesnar joined the Army National Guard, where he was assigned to an office job after his red-green colorblindness was deemed hazardous to his desire to work with explosives
DeLJ TIL One of the first original television programs in America was “The Television Ghost,” which featured dead people telling the stories of their murders.