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TIL that the Sahara Desert was once green 5000-11000 years ago due to Earth's orbital movement as it created the Humid period, which lasted a few centuries.

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erag TIL that during filming of “The Hobbit” in green screen with no one else to act with, Ian McKellan burst into tears and said, “This is not why I became an actor”
9YQvm TIL Disney uses test chickens to see where mosquitos are in the park. Disney strategically places groups of chickens around the park and regularly test them for mosquito borne viruses to see where mosquitoes are in the park.
mOMO TIL that the price of college textbooks has risen faster than the price of houses and inflation. AND there is a company that provides FREE online college textbooks that are almost identical to the ones we are paying top-dollar for.
v1eb4 TIL It is unknown what Neil Armstrong took with him to the moon personally and the record of his personal property kit was never found. Armstrong made an unscripted visit to a crater and it is speculated he left his late daughter's bracelet there
6E5DX TIL recent evidence indicates that not only is our brain “aware” of our gut microbes, but these bacteria can influence our perception of the world and alter our behavior.