The universe is the totality of existence, encompassing all matter, energy, and space. It is thought to have originated in a massive explosion called the Big Bang, which occurred approximately 13.8 billion years ago. Scientists study the universe’s physical laws and phenomena, including gravity, dark matter, and dark energy, to better understand its structure and evolution. The vastness and complexity of the universe pose some of the most significant mysteries in science, and uncovering its secrets is a crucial area of scientific research.