GENERAL KNOWLEDGE

Detailed explanation-1: -Around 13.7 billion years ago, everything in the entire universe was condensed in an infinitesimally small singularity, a point of infinite denseness and heat. Suddenly, an explosive expansion began, ballooning our universe outwards faster than the speed of light.

Detailed explanation-2: -According to the Big Bang theory, the universe began about 13.7 billion years ago. Everything that is now in the universe was squeezed into a very small volume. Imagine all of the known universe in a single, hot, chaotic mass. An enormous explosion-a big bang-caused the universe to start expanding rapidly.

Detailed explanation-3: -"The Big Bang was 13.8 billion years ago. “We get that number by the fact that the universe is expanding so when we look at galaxies, they’re all moving away from us and that’s true of every point in the universe.

Detailed explanation-4: -The Big Bang was the earliest known event in the universe. We can trace the history of our universe back about 14 billion years, to a fiery period known as the Big Bang. At that time, the universe was extremely hot and dense.