2. Origin of earth

The origin of life is connected with the origin of earth. The most basic question which led to many active and vigorous discussions among the scientists and researchers is that when and how did the universe evolve?

Out of the numerous theories proposed to answer this question the Big Bang Theory clearly explains the origin of universe.

According to this theory, \(15\)billion years ago, the universe had a massive explosion of cosmic material that resulted in hydrogen and other nuclei, which organized to form galaxies.
The universe started as a tiny spot of a hot and massive ball. The explosion threw the contents within the ball into all directions of space.

 

 

After this big bang explosion, the universe began to expand, and it continues to expand today. The universe expanded and cooled according to time, leading to the origin of life found on earth.The collapse of the gaseous clouds created the milky way and further the solar system due to its gravity of forming atoms and particles. These atoms, dust grains and gaseous discs aggregated to give rise to planets.

 

 

A galaxy is a complex structure made up of millions or billions of stars, as well as gas and dust, that is kept together by gravity. The beginning of life is closely connected to the beginning of the Earth.

 

There were many theories and opinions about how life began on Earth. They lacked experimental proofs, however. The contemporary idea of Origin of Life, on the other hand, is largely recognized around the world.