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42

TIL that we have been shaking hands since at least 900 BCE.

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kno7 TIL That in the first Pirates of The Caribbean movie, the director insisted on actually having 882 Aztec coins in the chest for “a sense of historical fantasy”. Johnny Depp also used a real pistol, made in 1760.
rRd6W TIL that Charles Darwin wrote a list of pros and cons of marriage. Pros included "constant companion and a friend in old age... better than a dog anyhow". Cons included "less money for books". When he visited his future wife he forgot to propose because he was too busy telling her about evolution
4Krb TIL unclean vocals (screams, yells, shouts) commonly used in metal genres, originated in the Opera, with the first recognizable use being in Alban Berg’s Wozzeck.
RZJj TIL Taurine, a common ingredient in energy drinks, was first isolated from the bile of an ox, but now is synthesized in labs. Cat food is required by law to contain taurine, since cats without a taurine-rich diet will go blind, and lose their hair and teeth.
yVA4X TIL Tower of the Americas in Texas held the record as the US's tallest observation tower from 1968 until 1996 when it was surpassed by the Stratosphere Tower. When pouring concrete, the crew almost forgot to install a pipe insert so plumbing could reach the observation deck