Author(s)

Béla Ralovich

Ministry of Welfare (retired), Budapest, Hungary.

The author thinks that the endless and timeless Universe is a permanent substance and energy flow as well as motion of celestial systems and bodies. Celestial bodies may have physical and biological life. Our Earth has both lives which can be divided into different periods of time. Its physical life can mainly be characterized by the atomic evolution, sterility, appearance of water and abiotic chemical reactions. Essence of the biological life is the existence of the living unit. Biological life of our Globe started with the first living unit/microorganism which began to influence on its environment which is a closed system for substance, flora, creature and man but not for hit of celestial bodies and for arrival of different kinds of energy from the space as well as for radiation of heat. The biological life of our Earth can be divided into four parts: before photosynthesis, before mankind, before 1778 and after the industrial revolution.

Energy and Substance Flow, Physical Life, Atomic Evolution, Sterility, Closed System, Biological Life and Its Effects on the Environment, Biological Evolution

Ralovich, B. (2018) Thoughts of a Medical Doctor about the Life Periods of Our Earth and the Evolution. Open Journal of Applied Sciences, 8, 411-421. doi: 10.4236/ojapps.2018.89031.