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TIL that humanities ancestors used to be able to synthesize Vitamin C in their body, but lost the ability due to mutation, analog to other species.

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kObaE TIL that online recipe blogs come with seven different short stories and 30 personal anecdotes in order to create copyright protections for the recipe being blogged about. Recipes get copyright protections while ingredients lists don’t. Someone else can claim your writing if it’s not unique enough.
W19N TIL that James Bond originally used a Beretta 418 until a fan of the novels (and small arms expert) wrote to Ian Flemming criticizing it as “a woman’s gun”. When Flemming had Bond switch to his iconic Walther PPK in Dr. No, he wrote the fan into the scene as MI6’s armorer
VMp5Z TIL that the Earth would have to turn once every 84 minutes or 17 times faster than the current speed in order for humans to be thrown off the planet, when the centrifugal force would be bigger than the force of gravity that holds us "down".
EgepV TIL that early semiconductors, before CAD, were made by hand drawing the circuit design on graph paper at an extremely enlarged scale, then cutting that design onto a film called Rubylith, which was used to create the final photolithographic mask. Repeat for all layers on a chip.
78EjP TIL of Burushaski - a language isolate predominantly from Gilgit-Baltistan in Pakistan. It has 4 genders - human masculine, human feminine, countable objects, and uncountable ones (similar to mass nouns)