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TIL laws restricting Chinese people to merchant visas made many Chinese restaurants in the U.S. These visas were only for fancy shops and the person had to run it for a year. Some groups used all their cash to open a nice restaurant and then switch who ran it each year so that they'd all get visas.

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OGG1 TIL the main culprit for toothlessness in rural Appalachia is “Mountain Dew Mouth” not inbreeding or poor dental hygiene as once suspected.
OoWb7 TIL the oldest known symbolic burial site was found in a cave, south of the modern day city of Nazareth, where a nine-year old was found buried with their legs bent and a deer antler cradled in their arms. The site was dated to circa 92,000 BP, making it about 95,000 years old.
vPXeB TIL of Helen, a Macaque monkey who was instrumental in the study of a condition in humans known as blindsight. Helen's primary visual cortex was removed, effectively blinding her. However, she blinked at motions that threatened her eyes and could navigate through environments as if she could see.
rR1eM TIL that when Coolio was asked to work on the soundtrack for “Dangerous Minds”, Stevie Wonder allowed him to use the instrumental and chorus samples from his song “Pastime Paradise” only if Coolio agreed to not include any profanity. Coolio said yes and the masterpiece “Gangstas Paradise” was born.
E1Knx Til the Sasanian Persians gassed Roman soldiers with sulfur dioxide during the Siege of Dura Europos. One of the earliest examples of chemical warfare