Popular Theories of the Origns of Life on Earth

Life began in the Ocean

The Big Bang theory is currently the most prevailing theory that explains the formation of Earth roughly 13 billion years ago. Substantial scientific research and theories are in agreement that when Earth was born, conditions on Earth was harsh. Due to nuclear fusion, Earth was very hot. One theory suggest that the heat of Earth evaporates the water which forms clouds and subsequently leads to rain. As Earth cooled, gravity traps the water collected and oceans started to form. Another theory suggested that oceans were formed by comet containing frozen H2O colliding with Earth. Coupled with intense tectonic activity cause by volcanic eruptions, constant bombardment by meteorite and the absence of a protective ozone layer, the harsh conditions on Earth was incapable of supporting any life form we know today.

Due to the intense activities on early Earth, basic chemicals would have start to react with each other. Chemicals and element such as Ammonia, Phosphoric salt, light, heat, and electricity (lightning) is present during early Earth period which made life possible. Life after this phase can be easily explained through Charles Darwin’s theory of evolution. However, the unexplainable explosion of life in such a short period of time for Earth to go from absolutely no life at all to containing a wide diversity of bacteria in approximately 0.1 billion years is a mystery phenomenon that even evolution cannot explain. Till today, there have been no complete understanding of how the origin of life began. There have been various theories proposed by experts such as life began in the oceans, life began on land and perhaps life did not begin on Earth at all etc. In this essay, three of more popular theories will be d...

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...templating how life begin? The three theory discussed above are the more popular theories proposed by people of various disciplinary. I personally feel that the second and third theory proposed are more scientific and therefore, more persuasive. However, up till more discovery has been made and more concrete evidence can be produced that not only explains the proposed theory but more importantly explain why the other theories are untrue and what exactly is happening, For example, the most recent theory proposed not only explains how the notion of life began in the land came about, it also explains why it is unlikely that life began in the ocean due to the large amount of sodium. I believe to keep an open mind on perspective. As Issac Asimov once said, “Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won’t come in.”