I thought I heard that although the Universe is constantly expanding, eventually it will reach a point where it bounces back, so it all begins as 1 particle that blows out and then springs back into itself and then will blow out again creating an entire new universe. If that is true, I'm not sure how someone knows that, how many times has it happened, what happens to everything as the universe collapses back to one particle..it's confusing to my little mind. If that is true though, then to me it would prove that there is life out there beyond us for sure. It wouldn't make sense for there to just be one planet with life inside the original particle big bang, because the life particle would also be blown out in all directions. It's just a matter of a life particle landing in an environment where it can grow. We know that there is life on this planet in conditions that seem impossible. We know that single cell organisms can survive in space where they simply become dormant until they once again have a chance to be in a suitable environment, so therefore if an organism was deep inside something so that it did not burn up in an atmosphere entry, then it would grow into something over time providing the environment is suitable. With such possibilities, it can help explain why we think of aliens as likely to look like humans, at least in the sense of being pi-peds. It is a possibility that all life is related back to the original life particle in the big bang. The twist is that you don't know how the environment of a different planet will affect the evolutionary chain. You could have a planet 4 times larger than this, and so with gravity the inhabitants are 4 times larger or whatever, and the most intelligent creatures have 8 legs to deal with the strain of their immense size..who knows! It's fun to think about all the possibilities.
