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90

TIL famed physicist Richard Feynman donated "93 boxes" of papers and writings to Caltech, which has never digitized any of it and will only provide access physically in the reading room of the Caltech Archives to qualified researchers. Caltech holds no copyright on the work.

Read more collections.archives.caltech.edu

via reddit.com

xVkw5 TIL that the earliest flush toilets were used by the people of the Indus Valley Civilization (existing from approx. 3300 BC - 1700 BC). Almost every home in the ancient cities of Mohenjo-daro and Harappa had a flush toilet connected to a common sewage system.
R7BA7 TIL that Sony recalled camera in 1998 that could see through clothes
Vw0Q TIL elephants are the only other mammals that have death rituals
VB174 TIL When It debuted in 1929, 7-Up soda contained lithium citrate, the compound now used by psychiatrist as mood stabilizer for people with bipolar disorder. It was initially marketed as Bib-Label Lithiated Lemon-Lime soda.
pYkO TIL there’s a programming language called Brainfuck whose command set consists entirely of just 8 characters. The “Hello World” program can be written as “ ++++++++++[>+++++++>++++++++++>+++>+++.>+.+++++++..+++.>++..+++.——.——–.>+.>.”