"World without end", and "Eternal Return" are two I know of. Roger Penrose is in this camp and attempting to prove it. Although he does incorporate the big ban

"World without end", and "Eternal Return" are two I know of. Roger Penrose is in this camp and attempting to prove it. Although he does incorporate the big bang theory, which is a kind of a "beginning", I suppose. I would recommend his book, "Road to Reality". You might gain more insight from ancient Hindu and Buddhist texts, but I can't recommend anything specific.