On sunny days, prisms set high in a south window of the National Museum of the American Indian in Washington, D.C., spill bright spectra on the floor and walls of the Potomac Atrium. The path of these ...
CC0 Usage Conditions ApplyClick for more information. Smithsonian marine biologists Kim Holzer and Jenny Carney sample ballast water from a bulk cargo ship in Virginia. Large ships take on ballast ...
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