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TIL "chicken sexers" are experts who can identify a chick's gender in about 3 seconds – over 1,000 birds per hour. Studying for this at the "Zen-Nippon Chick Sexing School" takes 2 years.

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848 TIL that Charlie Sheen, Emilio Estevez, Sean Penn, Chris Penn, Chad Lowe and Rob Lowe all went to high school together and made short films together.
QNWgd TIL sleep helps clean our brain. Or in the words of the journal Science, “Observations showed that when mice sleep, channels between neurons in their brains expand, allowing cerebrospinal fluid to flush out detritus, such as proteins that in human beings are associated with Alzheimer’s disease.”
VMdDZ TIL about the West Virginia Mine Wars; the 2nd largest insurrection in U.S. history, where miners, including former slaves, rose up against the oppression and exploitation of mine companies and the government that supported them.
4kpla TIL British outrage at the sentencing of a white Kenyan settler to just two years' imprisonment for the 1923 killing of a black employee eventually led to the replacement of the colony's legal code.
xRxo TIL Strabo wrote the earliest variant of the Cinderella myth circa 24 AD, set in Egypt. Rhodopis, a Greek, was bathing when an eagle snatched one of her shoes, carried it to the sunset, and dropped it into the lap of the Pharaoh. He searched for the owner of the shoe, found Rhodopis and married her