ABSTRACT
This chapter shows that in the search for a more comprehensive theory of evolution a much greater attention should be paid to the ways in which the physico-chemical environment interacts with the living organisms. Hence the name Geophysiology to describe the new science of Gaia; the science that studies ecological systems as if their components were co-evolving and influencing each other, and not just a mere sum of independently functioning parts. Geophysiological model shows that when there is a flow of thermal fluids rich in hydrogen sulphide, and presence of oxygen in the marine water, in the area of mixing of fluids rich biological communities flourish and start to modify their surrounding environment. In order to keep the biological communities alive, there has to be a constant supply of both oxygen and sulphides.
