This is one very long winded and pointless discussion. For some very good reasons.
1. - The planet Earth shows no signs of being anything else other than a planet possesing the capability of supporting life. It still functions like a regular planet with a core, crust and gravitational pull orbiting around a concentrated ball of energy.
2. - We are only capable of point one because our gravitational state and time scale is at exactly the right balance or in short, we were in the right place at the right time.
3. - In a galaxy there are MILLIONS of almost identical balls of energy each of them more than likely possessing planets in their orbit. And that is just one galaxy, we know of at least 7 in our current visual range possibly more beyond them. And in each of them there are millions of stars. so say we call it 500 million stars in each. thats 3500 MILLION stars. And most of them contain planets or planetoids in their orbit. If we assume we are the only life in the universe, its a 1 in an (lets face it) INFINITE chance that we are alone. But if you open your mind, give or take a few figures. Scientific research states that in theory, in all KNOWN galaxies there has to be at least 2 million planets capable of supporting life.
( Before some of you hit me with technicalities, I want to make this CLEAR, this is only a theoretical and scientific guess at the subject matter, I did not search the exact number of stars and so on, but the fact remains that in logical theory this stands up )
That is one hell of a big figure, to assume we are the only conscious creatures in this universe is not only stupid, but downright arrogant. But weather we actually meet these beings or not, is one entirely different question, one which can only be answered in time.