In the thought of Vladimir Vernadsky and Teilhard de Chardin, the noosphere can be seen as the "sphere of human thought" being derived from the Greek νούς ("nous") meaning "mind" + σφαίρα (sfaira) meaning "sphere", in the style of "atmosphere" and "biosphere". In the original theory of Vernadsky, the noosphere is the third in a succession of phases of development of the Earth, after the geosphere (inanimate matter) and the bio… (More on Noosphere)