One of the biggest mystery about the creation of the universe is what came before the Big Bang. Some scientist think that time just stops, meaning that nothing existed before the Big Bang. However, other scientist believe that there was no “before” the Big Bang. Everything started once the Big Bang happened so before does not exist. This might mean that we came from nothing, which is unexpected and difficult to process. Also, if our universe appeared from nothing, it could happen with other universes. The Big Bang is a theory about how the universe was created. The first time the idea of the Big Bang emerged was in the 1920s. George Lemaître first introduced the theory, but not all people believed it until Hubble’s discovery of the expanding universe and the Bell Lab’s discovery of the Cosmic Microwave Background Radiation (CMB). The Big Bang was an explosion that took place fourteen billion years ago. During the Big Bang, the entire contents of our current universe experienced a singularity, expanding outward from something smaller than the size of a proton. The theory changed the way we look at life. We were nothing before the Big Bang. The Big Bang and what came before the universe are not the only mysteries about the creation of the universe. Another mystery that scientist are exploring is the age of the universe. Scientist believe that the universe is slightly less than fourteen billion years old. Scientist theorize that the universe is less than fourteen billion years old because scientist obtain an estimate for the minimum age of the universe by determining the age of some of the oldest objects in our galaxy. Scientist have long wondered about the size of the universe. The discovery of the Big Bang theory allowed scientist to think about and measure the actual size of the universe. One size is the observable universe, which is what we can see, including stars, other planets and even other galaxies. Scientist estimate that the universe is fourteen billion years light years long. That is the extent of the observable universe. However some theorize that the universe extends in all directions beyond the observable universe. The limits on what we can see in the observable universe shows us that we need to build better telescopes or other devices that could tell us the actual size of the universe. State of the universe is a theory that is known by the Steady-State Theory it first emerged in the 1948 by Sir Hermann Bondi, Thomas Gold and Sir Fred Hoyle. The Steady-State theory is a view that the universe is always expanding. Edwin Hubble has observation that prove that the universe is expanding. Hubble would count changes in wavelengths of light from galaxies that were distant and most of the time those galaxies were moving away from earth at a really fast speed.