› added 7 months ago

25

TIL that Magnesium helped advance photojournalism. The first photography flash, a powder mix of Mg & potassium, created bright light when ignited. Jacob Riis was an early adopter and used it to document life in the often dark NYC's tenements. His work sparked public outcry, and then housing reforms

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8anlb TIL ashtrays are mandatory in every plane, even if smoking isn't allowed, it is for safe disposal of the cigarette in case anyone on board breaks the law
VMjBD TIL that Henry Ford had initially lead the movement of shorter working weeks from the entrepreneurial side of things. He (counterintuitively at the time) showed that shorter working hours led to higher productivity.
vE6D TIL Inspired by American independence, revolutionaries declared a United States of Belgium in 1790, but it was crushed by the Holy Roman Emperor in less than a year.
W7MG9 TIL I learned that my sext images via WhatsApp automatically save to my photo library while showing vacation pics to Grandma
R7QRl TIL that puffins can use sticks to scratch their itches. This is the first evidence that seabirds can use tools.