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TIL Alexander Graham Bell invented the telephone, but he was also a teacher for the deaf

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QJyX6 TIL The typical brain comprises about 2% of the body’s total weight, but uses 20% of its total energy and oxygen intake.
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awb1J TIL Stalin’s head of Poisons’ Laboratory, who spent years trying to find an undetectable poison leading to death by cardiac failure, died himself of a cardiac failure after reminding Krushchev how they took part together to a political assassination
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