More than just beautiful works of art, EcoSpheres offer a glimpse into life on earth and reveal the interdependence of plant and animal life with the most precious of all resources, water. Roughly the size of a large paperweight, EcoSpheres are, in fact, more like really beautiful science projects. These miniature, enclosed aquariums, which contain microorganisms in filtered sea water, employ space age technology initiated by NASA research into self-sustaining communities. They require no maintenance or upkeep, relying on nothing more than a source of artificial or natural light.