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TIL pupil size Is a marker of intelligence

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kOypW TIL Stephen Hawking found his Undergraduate work 'ridiculously easy' to the point where he was able to solve problems without looking at how others did it. Even his examiners realised that "they were talking to someone far cleverer than most of themselves".
boKN TIL that, until it was forcibly suppressed during WWI, German was the second most widely spoken language in the USA, with many local governments, schools, and newspapers operating in German.
GGwG TIL In 1976, a 23-year-old chemistry grad student synthesized a synthetic opiate which he used recreationally as a “legal high.” Unbeknownst to him, the drug contained a neurotoxic impurity that caused Parkinson’s disease symptoms.
MgEW TIL following the Volstead Act that began the Prohibition, crime rose by 24%, drug addiction by 44%, and federal expenditure on prisons rose by a staggering 1000%
0d9nL TIL the Church of Sweden has elections for its synodical assembly, open to all of its members. Political parties are represented in this administration.