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TIL that in the 1930s, the first pregnancy tests were done through injecting a woman’s urine into an infantile mouse, which would then be dissected so its ovaries can be inspected. If the woman was pregnant, the mouse would show signs of ovulation.

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Ewnw TIL that a British naval doctor figured out how to “treat” scurvy with lemons and oranges, he then published his findings which were well received. The British navy continued to supply sailors with less effective lime juice and scurvy continued as a major cause of death for a century.
GmXG TIL at 84 years old, Harvard Professor Tom Lehrer was asked by 2 Chainz for permission to sample a song Lehrer wrote at 24. He responded: “I grant you motherfuckers permission to do this. Please give my regards to Mr. Chainz, or may I call him 2?”
DQwVY TIL Michael Nesmith from the Monkees produced the video for Lionel Richie's hit All Night Long
e0rnn TIL of a Great year. A period of time that lasts 25,772 years and measures the rotation of the earths axis.
p8JGb TIL that in America, there are eight parking spots for every car, collectively taking up as much space as the state of West Virginia.