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TIL Roy Sullivan is believed to have been struck by lightning 7 times throughout his life. He began carrying a can of water incase he caught on fire (which he did!)

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VXe8 TIL not having friends has the same health risks as smoking a pack a day.
4kBlo TIL about Neils Bohr's Gunslinger Effect, which shows that for many competing actions (like two Western gunslingers drawing a gun) the reactor acts faster than the first actor
KOvNw TIL that not only there are three different types of Scotch blue tape, but also they have different "clean removal" time, e.g. blue tape #2090 has 14 days for clean removal, etc.
R7Gmw TIL That levels are sometimes referred to as "spirit levels" because the fluid inside was commonly colored spirit or alcohol for contrast. Today the fluid is usually a dyed ethanol because it doesn't freeze as easily and provides less friction for bubble movement when compared to water.
nQZB TIL that in Italy the installation of a bidet in a bathroom has been mandatory since 1975