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TIL Germany’s National Colors stand for “from the darkness of slavery (black) through the bloody battles (red) to the golden light of freedom” and got this meaning during the German campaign during the Napoleonic Wars. (German Link)

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RKl9 TIL that while most humans have three types of cone cells in their eyes, there are known cases where people have four, widening the spectrum and exactness of colors they can see. There are also cases where people lack a blocking lens, enabling them to see ultraviolet light.
RVG7 TIL that Ronald McDonald is called Donald McDonald in Japan
4X7VR TIL that Japanese scientists hypothesized that zebras' stripes deter insects. So they painted black and white stripes on cows and striped cows had about 50% fewer biting flies land on them than unpainted cows.
Oo4oY TIL There exists a non profit organization whose sole mission is to assure the six Apollo lunar landing sites are preserved and protected for posterity by having them included on the United Nations Educational, Scientific and Cultural Organization’s (UNESCO) World Heritage List
Ekew TIL we refer to money as ‘bucks’ because we used to trade with deerskin