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 ...
CC0 Usage Conditions ApplyClick for more information. A dragonfly larva emerges from the water with four distinctive lumps on its back. These lumps will turn into the most powerful wings in the insect ...
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