
What are you thinking is the Universe? Last opinions for this theme are that she is like sphere. I had read that when a man go in the past, one new universe is "born". Is this a true?
Lets think. What will happen if one man go back to the past with time-machine? By this theory, one new universe will appear. If in this machine are two men (like word "people") - they will be together in the end of the "travel". What will happen if two men, with two different machines, travel back to same place and date - if they meet eachother at the end-point, this theory will be changed

What are you thinking about this and what theorys do you know about the universe?
Thanks very much!