› added 5 years ago

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TIL black death helped bring about the Italian Renaissance

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via reddit.com

Ookdg TIL that we've tiny mirrors (retroreflectors) on the moon to reflect the laser beams fired from earth to measure the lunar distance. The round-trip takes of about 2.5 seconds and the distance to the Moon can be measured with millimeter precision.
9yJD TIL that there are over 5.5 million vending machines in Japan that turn over almost 7 trillion yen annually
Wka4o TIL In parts of Virginia it's illegal to trick or treat if you are over the age of 13 and is punishable as a misdemeanor unless you are just walking your kid or sibling(s).
6ZjZ TIL Coal fired power stations emit 100x more radiation than Nuclear power stations
x5Kk TIL that the act of hitting something until it works is called “Percussive maintenance”.