Dequibenzo, I disagree. I think life on other planets would be quite comparable to our own. Parallel evolution requires that groups of organisms develop physiology that would help them survive in their environment. Earth's life demonstrates that four limbs is an excellent way of getting around. We can also see that fins help sea-creatures travel through water, as both mammals and fish have developed them for the same purpose.
Evolution doesn't "pick paths", the environment does. Intelligent life would likely require a similar environment to earth's, so similar organisms would develop.
Meanwhile, take a look at this videoclip of a flying saucer filmed from a helicopter over New York. It's the first download at
this site.