007071 02 Nature Microbe Bacteria Alga Algae America American Artifact Building Buildings Cambridge Characteristic Circle Circular Color Colour Concept Diatom Diatoma Diatoms Earth Evolution Farlow Herbarium Flora Freshwater Algae Harvard Harvard University Lab Laboratory Location Marine Algae Massachusetts Microbe Microbes Microscopic Mineral Nature North America North American Object Orange Organism Physical Matter Plant Plants Plantae Shape Shapes Silica Silicon Silicon Dioxide Specimen Sphere Structure Subject Substance Unicellular United States University US USA Vegetation Frans Lanting USA Unknown photographer Frans Lan © Frans Lanting Frans Lanting Photography Diatom Farlow Herbarium Harvard University