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TIL: The fastest human powered vehicle on water was 18.5 knots/21.3 mph/34km/h , set by Mark Drela in 1991 using a hydrofoil Decavitator. Some think it took undue advantage of a Dupont Prize rule allowing for 3mph tail wind.

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dDKj8 TIL a mannequin in a California funhouse was revealed to be a real body when the arm fell off in 1976. It was the corpse of a man named Elmer McCurdy, an outlaw shot dead by sheriffs 65 years earlier.
AkZB TIL when asked what it was like to be in a coma, Evel Knievel replied “How the hell should I know, I was in a coma.”
0delN TIL that ice cave was coined by Edwin Swift Balch in 1900, and the three main temperature mechanisms are cold traps, permafrost and evaporative cooling. These mechanisms finally result in the cave temperature being colder than surface and then ice cave is formed.
7Agb TIL “[FBI] agents sought to persuade Martin Luther King Jr. to kill himself just before he received the Nobel Prize. ‘King, there is one thing left for you to do. You know what it is,’ FBI operatives wrote in their anonymous letter.”
XEGRD TIL that the serrated-edge knife on the multi-tool does wonders to cut through boxes and cardboard. I always used the straight-edge knife and didn't know I was doing it wrong all this time.