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TIL In the 1960s, the CEO of Ampex wanted his employees to take LSD to improve their creativity. The board of directors said no, and then had to fire him after they discovered he'd snuck off anyway on a mountain hike with seven or eight engineers and given them LSD.

rNVwy TIL that there were more Commonwealth (British and Canadian) than American troops that landed on the beaches at Normandy on D-Day
M7pNV TIL that the “Ulfberth” swords from the Frankish Empire became so popular among Viking raiding parties, that the Emperor imposed a ban on selling them. The ban led to neighboring countries making knock-off copies and selling them to the Vikings instead.
4knRJ TIL Octopus have 9 brains, 3 lungs and blue blood. Each of its 8 arms has one mini-brain, and one central brain. The blue blood is because the protein, haemocyanin, which carries oxygen around the octopus's body, contains copper rather than iron...
KY0K9 TIL Deliberate consumption of microplastics by Japanese quail chicks does not increase mortality, morbidity or reproductive success - but does cause minor delays in growth, a higher incidence of epididymal intra-epithelial cysts and delays in female sexual maturity.
m10ME TIL about Juliane Koepcke. At age 17 she spent 11 days alone in the Amazon rainforest after her plane broke apart & scattered the passengers. She knew how to give first aid & survive in the wilderness because she'd been homeschooled in a rural area, so unlike the others she survived her journey out.