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TIL that in seniors life expectancy can be predicted from their regular walking speed. The faster the speed the higher the survival rate.

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8ekmZ TIL a man named James Harrison had rare antigens for Rhesus disease. He donated plasma every week for 60 years and saved an estimated 2.4 million babies.
NX0VE TIL that mantis shrimps have 16 color-receptive cones in their eyes, compared to just 3 in humans, giving them the ability to see a vast array of colors. They possess one of the fastest punches in the animal kingdom. They can strike with the speed of a .22 caliber bullet.
WklpA TIL: Some swiss cheese lacks holes because the milk used to make it is too clean. A Swiss agricultural institute discovered that tiny pieces of hay dust are responsible for the holes.
ZpEwD TIL In-N-Out invented the fast food drive-thru when co-founder Harry Snyder invented a two-way speaker box in 1948
W79wY TIL During the Nigerian Civil War in the late 1960s, Norwegian government sent Stockfish (dried preserved cod fish) as food aid. Stockfish ended up becoming a Nigerian staple. Now, almost all of the Stockfish produced in Norway is exported to Nigeria.