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83

TIL the Metric system was invented in 1799

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pO14 TIL of the Wow! signal, a strong narrowband radio signal detected on Aug 15, 1977 that originated from near Chi Sagittarii. Its frequency is very close to the Hydrogen Line, which scientists believe intelligent races might use to send a strong signal. We still do not know its origin.
1alDW TIL whenever a hermit crab finds a shell too big for itself it'll wait until a queue forms and an individual that fits the shell is found. Then an exchange will occur - smaller crabs will move to newly emptied shells.
4k0Ag TIL the OTAN initials in NATO's emblem are its french name
V0EQ TIL www.whitehouse.com used to be a porn website, resulting in many schoolchildren in the late 1990s accidentally seeing adult content via the website
GbnG TIL that up until 1983, all caddies in the Masters Tournament were black. Due to the clubs tradition.