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TIL the American flag sometimes appears “backwards” - such as on the starboard side of spacecraft or the right shoulder of military uniforms - because U.S. Flag Code requires it to always appear as if moving forward.

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E1D17 TIL both Caller ID and call waiting were invented Dr Shirley Jackson; the first African-American woman to gain a PhD from MIT. Her breakthroughs in theoretical physics & telecommunications also allowed for portable fax, fibre optic cables, and solar cells.
pYY6N TIL that the movie "Jaws" used an engineless, fiberglass boat that could "sink on command" and resurface. The Orca II was a replica of the wooden Orca, a real boat used as Quinn's shark hunting ship at the end of the film. Pneumatic tubes tipped barrels mounted below Orca II to fill up and sink it.
Q5lM TIL at 52, Rolling Stones bassist Bill Wyman married 18-year-old Mandy Smith but divorced after a year. Bill’s 30-year-old son then Stephen married Mandy’s mother, age 46. If Bill and Mandy had remained married, Stephen would have been his father’s father-in-law and his own grandpa.
5Vopn TIL that water intoxication happens when too much water is consumed too quickly, causing an electrolyte imbalance that can lead to serious health issues or even death.
m1pZp TIL I learned when iran's king reza shah banned the hijab in 1933 many conservative women chose to either stay at home or wore it in rural areas or in extreme cases commit suicide