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TIL a 2007 study found that lap dancers who were ovulating made double in tips compared to when they were menstruating during a 5 hour shift. This was the first direct evidence of human males being economically influenced by females being “in heat”.

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via reddit.com

rNX60 TIL that undulatus asperatus clouds have a wavy, chaotic appearance that makes the sky look like a turbulent sea. These rare clouds, which were officially classified in 2017, are believed to form when weather fronts cause atmospheric instability.
8abWa TIL: The Panic of 1873 was known as the "Great Depression" until the events of 1929 and the early 1930s set a new standard.
j6j4a TIL Jerry Springer was born in a London Underground station that was being used as a bomb shelter during WWII.
wodQJ TIL that not everyone hears inside themselves. The condition of loudly hearing your own breathing, voice, and bodily functions is called Eustachian Tube Dysfunction.
yVkNv TIL Genghis Khan invented biological warfare and flung plague-infested bodies into cities during sieges, and is the reason for the Black Death being introduced to Europe.