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TIL in 1983, the American Association of Blood Banks was told by the CDC that their blood supply was infecting people with the AIDs virus, but they refused to screen the supply due to cost concerns.

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V7GD TIL Mike Kurtz, an american burglar, found out that eating common soap could produce the effect of ill health. His sudden and unexplainable weight loss and other symptoms baffled the prison doctors and he was able to fool officials that he was dying and received a pardon.
Y4Ox TIL that Elephants are excellent swimmers. They swim submerged underwater using their trunks as snorkels. African Elephants have been recorded swimming 48km .They can swim 6 hours nonstop then rest without sinking.
oyvW TIL a bidet is considered a key green technology and uses significantly less water, electricity, and wood than a single roll of toilet paper
lobr TIL the swedish former physical education teacher Richard Juhlin has the best nose for wine (champagne specifically) and in a now infamous blind tasting in 2003, arranged by Spectacle du Monde, he correctly identified 43 of 50 wines. The one who came in second correctly identified four.
R7mm8 TIL lobsters communicate by peeing in each others' faces.