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TIL Faulty coffee machines are one of the most common causes of flight delays.

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PYaxg TIL of the Greater Fool Theory, which states that the price of an object is determined not by its intrinsic value, but rather by irrational beliefs and expectations of market participants.
b9bw4 TIL: There are clear grand pianos. They're made of acrylic plastic. The Kawai CR-40 "Crystal Grand" is said to cost a quarter-million dollars according to one reviewer --though that's before haggling and discount codes. (At least the case and legs are clear; the interior workings aren't.)
VwnQ TIL that a 20 year old female and a 23 year old male auctioned off their virginity. Her highest bidder bid $780 000, and his highest bidder bid only $3000
R9a TIL there existed a translucent form of concrete that’s 30% lighter than regular cement, and comes in a variety of colors.
XER96 TIL one of the primary economic principles of Nazi Germany was the mass privatization of public industries.