As I understand it, there are only so many ways atoms can conbine together, and space is so vast with so many atoms in it that identical earths exsist else where due to probability. Question 1. I am confused with the term 'universe'. When I say 'parrellel universe' am I talking about some other dimension, or merely a matter of distance? Question 2. Does every choice you make 'split' an identical earth in a parrellel universe? 'Split' meaning, the two earths have been identical untill you decide to drive to work instead of walk. Thus on one earth you walk to work and on the other you drive. These daliy actions relating to the possible combinations of atoms unfolding in all possible arrangments. Question 3. If all possible combinations of atoms exsist, it is easy to assume that there exists a world where you have won the lottery or found your soul mate. However, can we also assume that there are worlds where people have evolved differently, into, say, Hobbits? And thus can we assume the The Lord of the Rings is a reality somewhere else? (I use LotR as an example, instead of the classic Matrix plug) Question 4. If all possible combinations of atoms exist, then ANY thought that you have is really a glimps into a parrellel universe. But then I say, "But I can think up some weird stuff, like flying pigs and horses that talk." So the question becomes, are there constraints on the possible combinations of atoms? Or is absolutely anything possible?