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TIL in 2016 the U.S. health department stopped recommending flossing because it has "no proven benefits"

Read more nydailynews.com

via reddit.com

jNn7a TIL that the gravity on the ISS is almost the same as it is on Earth. Satellites orbit by constantly freefalling around the Earth, and freefall causes weightlessness.
1arPV TIL that sloths take a shit once a week. This is the only reason they will leave their tree, and when they do, it's pretty much a life or death situation for them as predators can easily catch them off guard while they are on the ground.
b9bw4 TIL: There are clear grand pianos. They're made of acrylic plastic. The Kawai CR-40 "Crystal Grand" is said to cost a quarter-million dollars according to one reviewer --though that's before haggling and discount codes. (At least the case and legs are clear; the interior workings aren't.)
ZppoR TIL New Zealand had MTV 5 years before it launched, called Radio With Pictures. From 1976, The show had VJs, quality music videos, and band features. It gave valuable exposure to New Zealand artists and was the inspiration for MTV when Mike Nesmith of the Monkees saw the show and told MTV's creator
jN8BE TIL that all the people on Earth could fit, standing shoulder-to-shoulder, inside the 500 square miles of the city of Los Angeles.