Of course when we talk about life we consider this type of conditional life defined by time and place. Although death is literally opposite to life, it may be a reason that life exists and continues. An apparently dead seed, for example, may give life on favorable climatic, water and soil conditions. A living matter is essentially capable of maintaining its confinement and defies to equilibrate with the surrounding. In addition to this confinement property it can impart certain chemical change to its surrounding and/or propagate itself as faithfully as possible. Philosophically speaking, life may be explained in three orders: atomic, molecular and organismal. On this philosophical assumption, there is only life that exists.