Biosphere

From the Quicksilver Metaweb.

biosphere 1. En volume of space populated by living entities, population of populations of phyles of families of individuals. 2. It is both controlling and beeing controlled by these entities as a whole. 3. Gaia[1]. 4. A closed, self-contained, self-sustaining ecology, either natural or artificial. Biosphere II is an artificial biosphere.