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TIL that the longest running laboratory experiment in history, the Pitch Drop experiment, had its seventh drop fall in 1988. However, nobody witnessed it and its custodian, Professor John Mainstone, had stepped out to get a drink the moment the drop occurred.

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b9nGp TIL the earliest known use of "y'all" was from the English scholar William Lisle in 1631: "The captive men of strength I gave to you, the weaker sold; and this y’all know is true"
OG4Oe Til of Thomas Brassey, who, by the time of his death in 1870, was responsible for the laying of ¹/²⁰ of all the railways in the world.
RJOQ TIL that Tarrare, a French soldier with polyphagia, consumed vast amounts of food and objects, including live animals, without every feeling full or gaining weight. His case is still considered a medical mystery.
rgvw TIL it is customary for the residents of Churchill, Manitoba to leave their car doors unlocked in case you may need to take shelter from a POLAR BEAR
dOQK TIL “i.e.” isn’t shorthand for “for example”, and actually means “in other words”. Whereas “e.g.” should be used to say “for example”