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TIL WWII shipwrecks are an important source of "low background steel" (i.e. steel produced before the introduction of nuclear weapons) required to produced devices sensitive to radioactivity.

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MWNb TIL the Dead Kennedys wrote the song “Nazi Punks, Fuck Off” because they wanted a song where they could insult the overwhelming amount of Neo-Nazis / Skinheads that showed up to their gigs.
p8LNA TIL About The Kurgan hypothesis. That a group of peoples 6,000 to 8,000 years ago, whose language is now related to 440 others, spread across Europe and parts of Asia. Their word "lox" has survived unchanged for 8,000 years and means/pronounced the same as it is today in English.
WEmL TIL that Elvis Presley was obsessed with Karate and even used his skills to fight off 4 attackers who came at him during a show.
X0E5P TIL: stereotypes about "stupid, lazy Southerners" in the US were caused by centuries of hookworm infection which causes lethargy, anemia and iron deficiency. These, in turn, negatively affect growth and intellectual development in children.
5Yp8R TIL that in 1984, Disney was almost bought by MCA, the then-parent company of Universal, with the deal only falling through because of Disney’s insistence that Ron Miller, the Disney CEO at the time, be MCA president.