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Hold a world in the palm of your hand with this extra large sphere from EcoSphere. Developed by NASA, the Original EcoSphere is a totally enclosed ecosystem complete, self-contained and self-sustaining miniature world encased in glass. Inside the sphere is filtered sea water containing active micro-organisms, small shrimp, algae and bacteria. Because the EcoSphere is a self-sustaining ecosystem, you never have to feed the life within. Simply provide it with a source of indirect natural or artificial light, and enjoy its aesthetic blend of art and science, beauty and balance.