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TIL it's likely that "lizard-hipped" dinosaurs such as the T-rex and the velociraptors were warm-blodded.

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VA6B TIL an actor who appeared as an extra in 12 episodes of the original Star Trek series – and whose face can be seen clearly in at least one episode – was never credited and his identity remains uncertain to this day
Em6d TIL rats who were trained to press a lever for their food would stop pressing the lever once they saw that it would electrically shock other another rat
Xvok TIL the mongols tried invading Japan twice with massive naval fleets and on both occasions were devastated by a typhoon
Eg5mw TIL - The German language expanded because people began speaking differently due to a consonant shift, a phonological development that makes people pronounce consonants differently.
ZNRG TIL that the world almost came to an end in 1983 when a malfunctioning Soviet satellite falsely reported multiple launches of American ICBMs to a Russian bunker. Citing a “funny feeling in my gut,” the bunker commander directly disobeyed military protocol by not ordering retaliatory strikes