Any form of life begins where and when the biosphere is formed. Prior to its formation there was no one if by land, two if by sea, or three if by air distinct choices. Dry lands, the oceans, and the oxygenated atmosphere are the three vital components of every natural or artificial biosphere. However, for life the most important component is, not surprisingly, water. Since water can exist in all three physical phases of solid, liquid, and vapor without drastically altering its chemical properties, the triple point can be set at a thermodynamic temperature of 273.16 kelvins and absolute pressure of 611.2 pascals.

Firstly, keeping the pressure the same at the triple point, tiny increase in the temperature will definitely change water completely into vapor. Secondly, keeping the temperature the same at the triple point, tiny increase in the pressure will definitely change water completely into liquid. Thirdly, keeping the pressure the same at the triple point, tiny decrease in the temperature will definitely change water completely into solid ice. Nonetheless, the atmospheric pressure is measured to be 101325 pascals, a value more than 165 times high above the triple point of water. Therefore at average normal room temperature, say between 60°F-80°F, the preferred choice of the physical form of life composed mainly of water must be the liquid phase of existence. Investigating the phase diagrams of other chemical elements will clearly show their preferred choice for constructing the various physical structures of all life, forming their skeletal, muscular, circulatory, respiratory, digestive, and nervous systems that are composed of organs and tissues which tend to follow networks of fibrous lattices dotted with complex cell vertices that always maximize physical contact surface areas among them.