- hydrospheres
- hy·dro·sphere || 'haɪdrəsfɪr /-sfɪə n. waters which cover the surface of the earth
English contemporary dictionary. 2014.
English contemporary dictionary. 2014.
Evolution of water on Mars and Earth — The evolution of H2O on either planet needs be understood in the context of the other terrestrial planetary bodies and their current H2O inventories.H2O Inventory of MarsA significant amount of surficial H has been observed globally by the Mars… … Wikipedia
Hydrosphere — A hydrosphere (from Greek ύδωρ hydor , water + σφαίρα sphaira , sphere ) in physical geography describes the collective mass of water found on, under, and over the surface of a planet.Other hydrospheresA thick hydrosphere is thought to exist… … Wikipedia
Gaia hypothesis — The study of planetary habitability is partly based upon extrapolation from knowledge of the Earth s conditions, as the Earth is the only planet currently known to harbour life. The Gaia hypothesis, also known as Gaia theory or Gaia principle,… … Wikipedia