"These creatures get their energy from sources we never imagined," McKay exclaims. "the South African extremophile bacteria are powered by the radioactive decay of unstable atoms in the rocks."

“这些生物从一个我们从未想到的来源获取能量，”McKay惊叹，“南非的极端微生物细菌吃的是岩石里不稳定原子衰变时的放射能。”

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Lead isotope research shows that lead in ores of Mujiazhuang copper deposit and near ore country rocks is characterized by being rich in radioactive lead.

铅同位素结果研究表明，穆家庄铜矿矿石铅和近矿围岩岩石铅具有富含放射性成因铅的特点。

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However, other rocks are also radioactive, notably some carbonates and feldspar-rich rocks.

然而其它一些岩石也有放射性，常见于碳酸盐岩和富含长石的岩石。

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We're not sure if these alien rocks are radioactive, but if Kryptonite did come in art form, it'd probably resemble something like what we see below.

ENGADGET: Alt-week 8.11.12: Robo-billies, quasicrystals and radioactive art