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TIL Astronomer Rudolf Wolf only counted large sunspots that were clearly visible so observations can be consistent with older telescopes, even though his assistant noted that one can actually detect many more sunspots

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neBLG TIL that out of the 22 deepest mines in the world 17 are located in South Africa
b6Yxp Today I learned that according to a study from British psychologist Kevin Dutton, being a civil servant is the 10th career path with the highest number of psychopaths.
X0p8P TIL that feudalism continued in Europe until 2008, when the tiny English Channel island of Sark elected a new form of government
OG5bY TIL the ancient Greek astronomer Aristarchus of Samos realized the Solar System was heliocentric 2000 years before Copernicus, but was mostly ignored.
b6JbQ TIL Heroin was a patent by the Bayer Company and Cocaine was a trademark of the Merck Company.