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TIL in the mid-1800s, a snail spent nearly four years glued to a specimen card in the British Museum before scientists realized it was still alive.

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yVvP8 TIL of HAVOC: High Altitude Venus Operational Concept - which would include artificial floating islands on Venus at an altitude that provides better living conditions than the surface of Mars or Titan
XEwak TIL that stress can hinder our ability to develop informed plans by preventing us from being able to make decisions based on memory.
nw6W TIL the creator of pop-up ads, Ethan Zuckerman, apologized for its creation, saying “I’m sorry. Our intentions were good.”
R7Xyl TIL Baby Doe Tabor went from rags to riches to rags again after her husband lost his fortune the panic of 1893. She lived in a mining tool shed for 30 years in Leadville Colorado and was found frozen to death at the age of 81.
neJgP TIL A radioactive energy drink called "Radithor" was sold in the US market for a decade in the 1920s. Radium 226 and 228 isotopes we’re used, and the expensive product claimed to cure impotence, among other ills. Some of the more prominent users had to be buried in lead coffins.