About 13.8 billion years ago.The universe was very hot, small, and dense.The tiny particles of universe were group together.But then the universe expanded as very quickly suddenly.That started the creation of atoms.This atoms made the galaxies, stars and planets.
In the first instance everything was plasma.No solid, no liquid, no gas.Then atoms came together.This created first stars.The first stars that occurred group of atoms created bigger atoms too.Also stars started to group together.That led to formation of galaxies too.
Galaxies were splitting and grouping together again and again.This created other new galaxies that we live in one of them.It is hard to believe but the universe expanded till today and is still expanding.It is becoming colder as time passes.
After these happened, our planet that we know as earth was formed.It was part of solar system and it was turning around of sun.There was no necessary environment for life.Because it had not have water yet.Also Earth’s atmosphere had not formed completely.
Earth was very hot because of magma.Day by day earth got colder owing to comet and other reasons.Magma started to frozen.As comet passed from around of Earth it provided wetness and basic element.All of them made our planet to livable.
Finally Earth became suitable for living.New lives occurred.Temperature and pressure was best level for alive.Started to rain and some plants grew.That was a good news because LIFE had started.