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Yes, Superman’s kryptonite is (sort of) real

SERBIA, JUL 14 – Serbia halted mining plans after environmental reviews found risks to 4,900 acres of farmland, with the mine potentially supplying 1.51% of global lithium demand, officials said.

Summary by Popular Science
Superman’s only major weakness—aside from bright red capes—is kryptonite. The fictional mineral was first described in 1943 during an episode of The Adventures of Superman radio serial, but it would take another six decades before fans learned its chemical ingredients. In the 2006 film Superman Returns, kryptonite was finally described as an amalgamation of “sodium-lithium-boron-silicate-hydroxide with fluorine.” In a bit of cosmic coincidence, …

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Popular Science broke the news in United States on Monday, July 14, 2025.
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