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TIL of an algae-based polymer gel injection which stops bleeding almost immediately; it forms a clot within 12 seconds & permanently heals a wound within minutes. It was invented by Joe Landolina when he was a teenager, and so far is approved for veterinary use.

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p89p TIL the term “suck it” was used almost twice as often in the 1650 as it is now
nWo4d TIL that the 1984 song Careless Whisper by Wham! had been previously produced and recorded in 1983 but George Michael did not like the way the saxophone sounded so he decided to have it re-recorded. The earlier recording is known as "Careless Whisper (Jerry Wexler version)".
mxKyv TIL of the pig-footed bandicoot, an Australian marsupial with hooved feet that went extinct in the 1950s.
W7gjX TIL Space Poop Challenge, a 2016 contest sponsored by NASA for new designs of space toilet systems for use in space suits, requesting "proposed solutions for fecal, urine, and menstrual management systems to be used in the crew’s launch and entry suits over a continuous duration of up to 144 hours".
DQn5D TIL in 1927, actress Mae West spent 10 days in jail because of the explicit nature of her stage play "Sex".