The Enigma Of The Universe : 2. Universe without Beginning and End

There are many scientists who have put forward the view that the universe is eternal-without beginning and end. Their views are based on different scientific theories and may be divided mainly in five types:

1. The Self-pulsating Universe.
   
2. The Hyperbolic Universe.
   
3. The Cyclic Universe.
   
4. The Steady-State Universe.
   
5. Einstein’s Universe.