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TIL A "dirty thunderstorm" is a lightning strike inside a volcanic cloud

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Xydr TIL that the Egyptians were the only ancient culture to recognize blue as being distinct from green. Today, certain tribes, such as the Himba people in Namibia, cannot make the distinction.
lkjG TIL dolphin communication follows a linguistic rule that unites human languages, called Zipf’s law. The law states that the frequency of a language’s common words follow a trend — the most common word in a language appears twice as often as the second most common word.
4bd5 TIL the longest certified foot race in the world is the ‘Self-Transcendence 3100’ where runners must do 5649 laps around a single block in Queens New York.
XERj6 TIL the American version of Whose Line Is It Anyway? was filmed over a four year period before it was cancelled but ABC was able to air another four seasons from material recorded during its original run.
WZw4 TIL that The Ben Franklin effect is a proposed psychological phenomenon stating that when we do a person a favor, we tend to like them more as a result. This is because we justify our actions to ourselves that we did them a favor because we liked them.