It is amazing to get used to the fact that the universe is continuously evolving, it is changing every day, every minute and every second. It will ultimately die and take rebirth. This cycle of birth and death has been there prior to our existence and will continue till eternity.
The Big bang theory no doubt has its limitations but nevertheless, it is a good starting point. For a long time it was thought that the universe is static, not changing and in equilibrium. However experiments showed it otherwise, it was found that the universe which we have made home is ephemeral, it is in a continuous state of change. Nothing is permanent, though the world gives an illusion of permanence. The Big Bang theory was an absolute effort to explain how our universe came into existence.
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