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TIL Buzz Aldrin “McGuyverd” a broken circuit breaker on the Apollo 11 lander with a felt-tip pen, without which Aldrin and Armstrong would have died on the moon

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x69Pw TIL that the mirrors required for the production of advanced microchips are so flat that if scaled to the size of Germany the highest point will only be a tenth of a millimeter. Because of that the German technologies company "Zeiss" is the only one in the world able to produce these mirrors.
a8gkA TIL Tree burls, a form of tree growth deformity, have unique patterns that make them valuable too woodworkers. Redwood burls are especially valuable and have been poached by thieves in the past.
kO0V1 TIL About 85 percent of the things you worry about never happen.
4kAPw TIL Cuba’s biggest economic export is doctors, who they lease to foreign governments for $11 billion a year, with around 50,000 Cuban doctors serving 67 different countries at any one time
e0lGE TIL that the Iran women’s national soccer team fielded up to 8 men in 2015.