Green crystalline? I thought kryptonite was a fictitious comic book invention, but I Googled it in case some scientist was also a Superman freak and used it for something discovered or created in the lab.
I tried both my spelling and yours and came up with padlocks and slang for a type of black pot. Therefore, I have no idea what the kids were being taught was kryptonite. Jello?
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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