What is Big Bang and Cosmic Inflation?

Preview:

BB theory explains the evolution of the universe from its early individualities to the present day and predicts what can be expected in the future. In short, the BB model covers more than 13.82 billion years of space expansion and is quite impressive. Very early on, the universe was really hot, really dense, and really small. This is called the first singularity, or "Big Bang." The theory does not start with this singularity, but the singularity is just a fantasy to say, "Our equation collapses at this point." Our model begins just a moment after this first singularity and moves forward with it. BB theory explains that the universe is gradually expanding and cooling, and from this hot, dense, small initial state, it has become a huge, complex, and fairly chilly place as it is today.

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