- While all known life uses water as the solvent, other solvents are hypothetically possible.
- The biochemistries associated with such hypothetical life forms would be radically different from that of Earth-based life, yet the possibility exists.
- Many substances other than water (or mixed with water) could (very) hypothetically serve as a solvent for life (generally at temperatures and pressures at which they are liquid) including ammonia, methane, other hydrocarbons, sulfuric acid, hydrofluoric acid, nitrogen or supercritical hydrogen.
- Resources include: http://en.wikipedia.org/wiki/Hypothetical_types_of_biochemistry
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