So science has established a start date for the universe based on the rate it is expanding. Matter and energy cannot create matter or energy according to the laws of physics. It can transform from matter to energy or the other way around but only something supernatural that does not conform to natural law can create the matter and energy out of nothing. Likewise science knows the universe has been expanding since creation. Into what? Everything we know points to a supernatural power, what you call it is really less important than