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51

TIL a dozen intersex athletes competed in the Olympics, usually discovered after the onset of sex verification testing

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j6dRp TIL that Sphynx cats can have blackheads on their tails
J18Qj TIL, that only 4% of the population have aphantasia, the absence of a mind's eye
XExj8 TIL that an acre was originally a rectangle made up of furlongs, which were the distance a pair of oxen could plow before resting
wowyo TIL early 20th century pregnancy tests involved a lengthy and costly process where the urine sample would be injected into five mice per woman. The mice would then be dissected to find out if they were ovulating. These results would be obtained in a week.
OMYL TIL that in Japan, trains are so punctual that any delay over 5 minutes usually incurs an apology over the tanoy and a “delay certificate” for passengers on their way to work. When trains are delayed for an hour or more, it may even make the news.