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TIL: The first quantitative estimate of the speed of light was done in 1676 by timing eclipses of Jupiter's Io.

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vPm78 TIL that Australia uses Polymer bank notes that are waterproof and notoriously hard to counterfeit due to its complex design.
kJwvg TIL that in 1866, one year after the end of the Civil War, 1/5th of the state budget of Mississippi was spent on artificial limbs.
vP6Aj TIL about EuroAirport, it's on the triple border and serves France, Switzerland and Germany. The airport is jointly administered by France and Switzerland, governed by a 1949 international convention.
pYEDG TIL: That only 10% of the water use in California is used by Californian residents with the rest being used by Farming and other Big Bussines
QJ8vM TIL almost 1/3 of Canadians under 34 still live at home