Bacteria that live off of electricity

I hadn't heard of this finding of microbes that link together in chains and live off of the electrical differential/potential as electrons flow across the circuit created.

Here's the article:  Have we found alien life?

quote: “It is kind of like science fiction,” he says. To a biologist, finding life that chugs along without a molecular energy source such as carbohydrates is about as unlikely as seeing passengers flying through the air without an airplane.

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