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Photo of scientists with a graphic overlay with the text "top 10 science stories of 2021" 3D image of melanin in a zebrafish sample captured by micro-computed tomography. (Credit: Spencer R. Katz and Daniel J. Vanselow/Penn State College of Medicine) Solar fuels device. Gloved hand holding a petri dish of radiative coating Windmills in Jaisalmer, Rajasthan, India. stock photo of sunlight hitting leaves liquid robots Photo of Berkeley Lab scientist Tong Zhou working on lasers at a lab table.