Yes, because it has been well-established by astronomical observations such as the apparent movement of galaxies away from us, and the cosmic microwave background radiation believed to be the...
Big bang theory isn't really based on a belief system but is a conclusion drawn from the observation of the universe; the universe can be seen to be expanding today, if you work backwards then it's...
The short answer is yes. The accepted explanation that science has for where the universe came from is the "Big Bang" - that if you go back far enough, you reach the point where all the matter in the...