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TIL President Herbert Hoover and First Lady Lou Henry Hoover were both fluent in Chinese and would speak it to each other in the White House to prevent eavesdropping.

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K7JG TIL The flag should never be used as wearing apparel, bedding, or drapery. Also, the flag should never be used for advertising purposes in any manner whatsoever.
R7Rx8 TIL the "artificial banana" flavor is based on a real kind of banana called the Gros Michel. It was actually the predominant commercial banana available in the US prior to the 1950s, until a plague mostly wiped them out and they were replaced with the Cavendish banana we have today.
nWaEP TIL about Wood’s Metal. Because it melts at low temperatures, it was used to make joke spoons that would melt in hot soup. It is also highly toxic.
vWZ7 TIL of the “Tinker” supreme court case. In 1965 as a Vietnam War protest 3 kids wore black armbands to school. The school banned the armbands. They wore them again and were suspended. The “Tinker test” is used to see if a school’s disciplinary actions violate students’ 1st Amendment rights
Lkr6d TIL - Eberhard and Tarpenning were the original founders and incorporated Tesla, while Musk, Straubel and Wright joined in a Series A round later on. A lawsuit settlement agreed to by Eberhard and Tesla in September 2009 allows all five to call themselves founders.