It’s difficult for us layfolk to gauge the real implications of breakthrough research announcements, but when the scientists start throwing around words like “nirvana,” it does catch the attention. And from the description of the latest work of MIT’s Daniel Nocera, the Henry Dreyfus Professor of Energy, it’s easy to get excited. Nocera and team say they’ve come up with an answer to the dark side of solar energy–the difficulty of storing it for when the sun isn’t shining.

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