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TIL of the half-life of knowledge which pertains to the duration it takes for half of the knowledge within a specific field to become outdated or replaced.

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via reddit.com

BnVe TIL that Canaan Banana, the first president of Zimbabwe, passed a law in 1982 outlawing jokes about his name
v1E5K TIL of the Freedmen. The Cherokee had black slaves. In 1866 they signed a treaty that freed them and granted them and their descendants, tribal citizenship after Emancipation. The Nation has ostracized them and is trying to strip them of tribal citizenship largely due to their darker complexion.
4XPPw TIL James Stewart suggested to the director of Harvey that he change some shots to make them wider so that "Harvey," the 6'3" invisible rabbit, would be in frame.
y78l TIL that since its inception, not a single member has been harmed in the United States Witness Protection Program.
X0pwX TIL the never materialized movie “The Incomparable Atuk” was called cursed as several actors associated with the film’s development died, including four comedians.