The Big Bang Theory is a scientific explanation for the origin of the universe. It posits that approximately 13.8 billion years ago, the universe began as an extremely hot and dense point, often referred to as a singularity.
This singularity expanded rapidly in a process known as cosmic inflation, leading to the formation of space, time, and all matter.
As the universe expanded and cooled, particles formed and combined to create atoms, which eventually coalesced into stars, galaxies, and other structures.
Key evidence supporting the theory includes the redshift of distant galaxies, indicating ongoing expansion, the cosmic microwave background radiation, and the abundance of light elements like hydrogen and helium.
Overall, the Big Bang Theory offers a comprehensive framework for understanding the universe's early development and evolution.