Life is a fundamental concept in a universe which happens to be relatively teeming with it. The nature and definition of life have been debated over and speculated upon by the philosophers and scholars of all sophont species throughout spacetime. At the formation of the United Spacefaring Sophonts Coalition, a solid universal definition of life and biospheric classification system was agreed upon to discourage the potential for discrimination later on and help biologists better understand their field of study. Under this definition, life is characterized by the following attributes:
- The ability of the entity in question to consistently regulate its own internal entropy.
- The ability of the entity in question to replicate all or parts of itself, independently, regardless of the type of biophysical unit replicable; or the ability to reproduce sexually; or the ability to replicate its consciousness.
- Inertia-independent reaction to stimulus, however slight and regardless of speed.
- The independent production or collection and internal storage of energy for self-use, including but not limited to: active biological molecular processes, capacitor structures, nanoscale electrothermal turbines, etc.