Life probably does exist somewhere else on some distant planet. After all scientists now think that life started when some meteor, infested with microbes, hit the earth. Most likely senora is that the 'aliens' are just a bunch of microbes sitting on a rock somewhere and all they are doing is respiring(not to be confused with breathing.) However, the thought does occur that if we started from a rock that hit earth, does that make us aliens to earth? If this is true, surely 'the aliens in flying machines' are us in our ROFLcopters.