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TIL That the word "Jiffy" (as in, "i'll be back in a jiffy" or "Jiffy Lube") refers to an actual Unit of time, 'The Jiffy', which is defined as "the amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum".

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aw7xb TIL of the Alpine Spaniel, a now extinct dog bred by Augustinian Monks for rescuing travelers stuck in the snow of the Great St. Bernard pass. Dogs were sent in pairs so one could alert the monks when they found someone. They are said to be ancestors of modern-day St. Bernards
9YXNp TIL about the blanket octopus, named for the sheets of thin webbing between its arms. Females can reach over 6' (1.9m) in length, while males are approximately the size of a walnut. This is the most extreme case of sexual size dimorphism found in nature.
yDja TIL In 2013 Scientists wired the brains of two rats together and showed that signals from one rat’s brain can help the second rat solve a problem it would otherwise have no clue how to solve.
BgQgx TIL There was an English King, Henry II, who at one point controlled more of France than the French King Louis VII.
Bwxb TIL that the tombstone of U.S. Air Force veteran and gay rights activist Leonard Matlovich states this: “When I was in the military, they gave me a medal for killing two men and a discharge for loving one”