On a more preferable note, Earth has had moderate atmosphere primarily, hence warm enough for abundant liquid water and large enough gravity to shun losing it. However, the Faint–Young Sun Paradox [02] indicates that our sun has been 25-30% dimmer during the stellar evolution period than its luminosity or intensity today. This refutes Earth having a moderate atmosphere earlier as a dimmer sun would have frozen its surface. But the evidence show that Earth has not been frozen since 4 billion years ago. The paradox suggests that Earth’s atmosphere must have been thicker with greenhouse gases (CH4 and CO2) to regulate temperature and help retain water in liquid form. The atmospheric CO2 content of Earth today is approximately 0.0003bar and calculations
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Over time the surface cooled and froze. During the process, volcanoes erupted emitting greenhouses and forming a blanket cover over earth. This warmed the surface leading to evaporation and condensation process to begin creating rain and eventually oceans of liquid water. Afterwards Earth was bombarded with meteorites containing minerals, water and amino acids – vital ingredients for life, which settled down in sea beds. Protein based meteorites transformed into single celled bacteria and started photosynthesis using sunlight, releasing oxygen into the atmosphere. This was the turning point, as the abundance of this gas triggered complex life-forms to develop and biology to splendor. The process repeated itself when 95% biology was wiped off Earth’s surface due to Methane concentration after continued volcanic eruptions. The second cohort saw evolution of the remaining 5% life into massive dinosaur dominant era. It is believed, that the 165million years reign of dinosaurs was ended by an asteroid impact building towards the third cohort of life form-from the survivors. The Darwin’s Theory of evolution led to development of the most intelligent beings we see today – the human race. However, this intelligent form of life is now under threat of climate
Over time the surface cooled and froze. During the process, volcanoes erupted emitting greenhouses and forming a blanket cover over earth. This warmed the surface leading to evaporation and condensation process to begin creating rain and eventually oceans of liquid water. Afterwards Earth was bombarded with meteorites containing minerals, water and amino acids – vital ingredients for life, which settled down in sea beds. Protein based meteorites transformed into single celled bacteria and started photosynthesis using sunlight, releasing oxygen into the atmosphere. This was the turning point, as the abundance of this gas triggered complex life-forms to develop and biology to splendor. The process repeated itself when 95% biology was wiped off Earth’s surface due to Methane concentration after continued volcanic eruptions. The second cohort saw evolution of the remaining 5% life into massive dinosaur dominant era. It is believed, that the 165million years reign of dinosaurs was ended by an asteroid impact building towards the third cohort of life form-from the survivors. The Darwin’s Theory of evolution led to development of the most intelligent beings we see today – the human race. However, this intelligent form of life is now under threat of climate