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Last Wednesday, a Twitter user named David Magno discovered something in his physics textbook: Dat Boi. “Dat Boi” is, of course, a unicycling frog. He is the central figure in a new and spectacularly ...

What do Pepe the Frog, the Spanish Inquisition, the blinking guy, the French Revolution, concern for the environment, and the Third Reich all have in common? These are all ideas that spread until they ...