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Billions of Years of Evolution Part 2

By admin on September 9, 2021

As Psions of Psionic Circles and citizens we should know the basic facts regarding the Earth and its properties as well as the history of its inhabitants. So let us continue with a brief account of some of the major evolutionary changes in life from the beginning to current year. Introduction Original Date: September 9 2021 Last Updated: September 9 2021 Planet Earth Evolution Continued We last discussed the facts. Our planet earth has undergone many changes on the surface of the planet and in the atmosphere over its billions of years of existence. And during the last billions of years it has become the home of all plant and animal species that have been able to survive the multitude of changes that has occurred. It is also the the home of 7.8 billions of human beings spread over 7 continents and thousands of islands. As Psions and citizens we should know the basic facts regarding the Earth and its properties as well as the history of its inhabitants. So let us continue with the purpose of giving a brief account of some of the major evolutionary changes in life from the beginning to current year. . Let us start with recapitulating 2.9 billions ago to 2.0 billion years ago and move on from there. 2.9 billion years ago to 2.0 billion years ago The “great oxidation event”. The poisonous waste produced by photosynthetic cyanobacteria – oxygen – starts to build up in the atmosphere. Dissolved oxygen makes the iron in the oceans “rust” and sink to the seafloor, forming striking banded iron formations. Yet others think that cyanobacteria began pumping out oxygen as early as 2.1 billion years ago, but that oxygen began to accumulate only due to some other factor, possibly a decline in methane-producing bacteria. Methane reacts with oxygen, removing it from the atmosphere, so fewer methane-belching bacteria would allow oxygen to build up. Earth freezes over in what may have been the first “snowball Earth”, possibly as a result of a lack of volcanic activity. When the ice eventually melts, it indirectly leads to…