Life & the Earth

The earth that we live in today was not as lively as it looks now. Earth was a part of the sun, and due to the rapid rotation of the sun it was spun out of centrifugal force. It is believed that the earth was a ball of fire revolving around the sun. So being approximately a hundred and fifty million kilometers away from the sun it started cooling. For millenniums it revolved and reduced its temperature to a little above the boiling point of water. Until then there was no water on the earth, and the earth was filled with gases like methane and carbon dioxide. How life came to existence on earth is yet to be discovered but there are two main theories that state the possibility of what might have happened.

Panspermia, this is the theory that most of the scientists believe in. It simply states that life on the earth came from another source, possibly Mars. It may be hard to think but there is evidence that once Mars was a planet with water and thus there is a belief that there was life on Mars. In Panspermia, it is believed that some asteroid struck Mars and led a piece of it containing cellular life (bacteria) towards the earth. Scientists have proof that some bacteria are able to survive in space. Thus it is clearly possible how life would have travelled across the planets of our solar system to reach the earth. Slowly, these microorganisms converted the methane into oxygen and water. But with time, the mightiest evolution happened, the photosynthesis. It led to the creation of plants and trees. It changed the look of the earth from a ball of fire to a green and blue ball of life and water.

Thinking about the different ways in which this could have gone wrong makes me feel even more special. The only planet with intelligent life in the solar system. With such intelligence that they have managed to reach out to the other planets and their satellites. Truly, What a wonderful world!