The Big Bang is the leading explanation for how the universe began. According to this theory, the universe started as an infinitely hot and dense single point, known as a singularity, which exploded with unimaginable force, creating matter and propelling it outward to form the billions of galaxies we see today
. However, what caused the Big Bang remains a mystery. Some experts believe it was the beginning of time, while others think it may have been a result of a previous universe contracting into a singularity and then bouncing back, leading to the current expanding universe
. The Big Bang theory is supported by extensive evidence, including the observation that the universe is expanding and the existence of the cosmic microwave background
. Despite the lack of a definitive answer to what caused the Big Bang, the theory remains the most widely accepted explanation for the origin of the universe.
