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TIL that an aircraft crash resulting in the pilot's death or total destruction of the aircraft is called a "Class A Mishap" by the US Air Force.

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via reddit.com

gMXL9 TIL that if a tail shed by a lizard as a decoy was not eaten by the chasing predator (and the lizard gets away too) the lizard would return to eat its own tail. Turns out the shed tail is a great source of fat to regain the energy lost in its getaway.
1rxO TIL in the 2005 film ‘Charlie and the Chocolate Factory’ the chocolate river was made of actual chocolate instead of CGI. It was made of about 192,000 gallons of chocolate.
kJ6yB TIL about Kosher Switch, a light switch that complies with the Sabbath commandment by only working sometimes and hence doesn't count as intentionally lighting a fire
epODJ TIL in the Karajá language, only women generally pronounce the sound /k/. With time, the extensive weakening of the /k/ sound became associated with masculinity while its preservation was seen as a sign of femininity. This is an example of a socially motivated phonological rule.
LkB1V TIL that only 10% of wine 'experts' can consistently rate the wine from the same bottle in the same way, and they aren't consistent the next year. After analysing results across wine competitions in california, medals were found to be distributed at random.