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Kevin Folta, an assistant professor of horticultural sciences at the University of Florida’s Institute of Food and Agricultural Sciences, examines arabidopsis plants growing under a bank of light-emitting diodes, or LEDs. Folta believes LEDs, which are more energy-efficient than incandescent light bulbs, could be used to grow plants on a future Moon base or mission to Mars. (Photo by Josh Wickham/University of Florida/IFAS)

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