The Noosphere is the sphere of thought enveloping the Earth. The word comes from the Greek noos (mind) and sphaira (sphere). The Noosphere is the third stage of Earth’s development, after the geosphere (think rocks, water, and air) and the biosphere (all the living things). The three spheres build on each other: For example, life in the biosphere needs the geosphere to survive (matter, water, and air), and thinking needs to be embodied in the biosphere, via the living brains of human beings and our technology. So the Noosphere can be seen as the rise of a planetary superorganism integrating all geological, biological, human, and technological activities into a new level of planetary functioning.