› added 4 years ago

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TIL that Ulysses S. Grant went on a post-presidency world tour from 1877-79. He was received quite well, often greeting cheering crowds, being offered gifts, and meeting various heads-of-state. He even acted as an unofficial diplomat in some cases, such as a land dispute between China and Japan.

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8aZ84 TIL that there are “black holes” in the ocean that have the same mathematical properties as “normal” black holes. They capture water instead of light and can grow as big as a city.
jn0M TIL that a mathematicisn named Danny Hillis built an analog computer that plays tic-tac-toe out of nothing but tinkertoys
m6xR TIL that grocery cashiers in the US are seldomly given chairs to sit during work (unlike in Europe).
xVbWB TIL a Texas professor failed his entire class and quit, because he thought that all of his students were disruptive or dishonest and therefore didn’t deserve to pass the course. He said the class was his worst in his 20 years of teaching.
yLA8 TIL that the United States consumes over 90% of the world’s stimulant drugs, and that there has been a 700% increase in the use of these drugs since 1990.