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TIL it’s U.S. law that every shower head has to be sold with a flow restrictor valve (for water conservation) and it’s easy and lawful to remove it yourself for better water pressure

JYAVj TIL dogs can "laugh" when they're playful. Researchers played recordings of dogs laughing to stressed shelter dogs, resulting in the dogs showing significantly fewer signs of stress. Many of the dogs and puppies began to bounce around, and responded with laughs of their own.
VMBaG TIL that during the 1920s a class president candidate at Harvard swallowed a live goldfish in a bid to win more votes. The stunt created a trend of 'goldfish swallowing' which became so popular that eventually Massachusetts state legislature had to create a bill banning it
8e9xV TIL that in the 20th century, native New Guineans were devastated by an incurable fatal degenerative brain disease called Kuru, "the shaking death." It was caused by eating cooked brain tissue during ritual cannibalism. Victims also laughed uncontrollably.
mxEMR TIL a long-lost Rembrandt painting was found in a basement in New Jersey. It was initially valued by a local auction house at $800, who were unaware of its true value. But numerous art buffs recognised its true value, resulting in it selling for $870,000 ($1.1 million with the sale premium).
OojRa TIL about George Lincoln Rockwell, an american neonazi, former WW2 vet who was best friends with the nation of Islam's founder the "prophet Elijah Muhammad" , he would famously be quoted declaring "Elijah Muhammad as the Hitler of black people" and the highest respect for the nation of islam