007035 01 Nature Microbe Bacteria Alga Algae America American Artifact Building Buildings Cambridge Characteristic Circle Circular Concept Diatom Diatoma Diatoms Earth Evolution Farlow Herbarium Flora Fossil Freshwater Algae Harvard Harvard University Lab Laboratory Location Marine Algae Massachusetts Microbe Microbes Microscopic Mineral Nature North America North American Object Organism Pattern Patterns 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 Frans Lanting Frans Lanting Ph MIC 032 © Frans Lanting Frans Lanting Photography Diatoms Farlow Herbarium Harvard University