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TIL that hunter-gatherer culture was the norm for 90 percent of human history.

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y7Ne TIL that on this day 100 years ago, Jack LaLane was born. When he opened his first health club, doctors advised their patients to stay away and warned their patients that “LaLanne was an exercise ‘nut,’ whose programs would make them "muscle-bound” and cause severe medical problems.
0d0MM TIL the baku, a mythical Japanese creature that eats nightmares. In the Meiji period, children would say, "Baku-san, come eat my dream" three times to get rid of bad dreams. But if the baku remained hungry after eating, it might also devour their hopes and desires, leaving them with an empty life.
v1PWB TIL that in 2016 India gave its citizens less than 4 hours notice that their two largest bills (worth about $8 and $16) would no longer be legal tender. They were only allowed to exchange a max of ₹2000-4500 ($31-70) per person per day, and ATMs were still running out of cash up to 5 months later.
rNEEM TIL about Soviet Zveno aircraft carrier planes. The converted bombers would carry fighters or dive bombers beyond their operational limitation, and launch them when needed. Despite being based on pre-WWII bombers and going through many configuration changes, they had a very high success rate.
pjop TIL - Before Radar Great Britain built huge concrete structures that acted as a ultra sensitive microphone to detect incoming enemy airplanes.