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The disaster I never imagined having to worry about
(i.ytimg.com)
General discussions about "science" itself
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Video talks about tin pest.
Ah, it's tin pest? (I'm watching the video right now.)
Same "basic" idea, of a vicious cycle. Except you don't need reaction with an external substance, like oxygen; the catalyst for tin pest is even more tin. (That means the blob over the cube of metal is likely a piece of grey tin. You could use germanium instead but eh, it's more expensive.)