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TIL Stanford engineers made a folding origami microscope that costs less than $1 to make. 50,000 microscopes were shipped to 130 countries in 2014 to see what people will do with it

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Lkg8p TIL the Coca-Cola Company tried to avoid raising the price of Coke by leaving 1 in 9 vending machine bottles empty. While most nickels inserted in their vending machine would yield a Coke, some patrons had to use 2 nickels, thus raising the price.
l7YR1 TIL USA has a mutual defense treaty with most of South America called the Rio Pact or TIAR. This alliance predates NATO by 2 years and has been invoked multiple times. Some countries not included are Mexico, Ecuador, Bolivia, Nicaragua, and Cuba.
VMDdB TIL that due to an intense shift to wartime production, America only produced 139 civilian automobiles throughout the Second World War.
j6BoQ TIL: The creators of the Myers-Briggs test had no formal education in psychology, were self-taught in psychometric testing and only received rudimentary education in test construction, scoring, validation, and statistical methods.
5VWYp TIL Mi’kmaq used birch bark canoes or hollowed-out hemlock logs fitted with long wooden runners or “skates” to sprint over the ice and water to Prince Edward Island. The British copied this design in the 1800s for Royal Mail delivery