[Gayle]

That's because we've explored our planet so we know what there is on it. We haven't explored outer space yet so how can you say there isn't something out there?

You're possibly right, there possibly isn't anything out there and we're completely alone in the universe, the only planet to sustain any form of life. BUT, my point is - that we don't actually know that for certain yet so it's a bit unfair to call it rubbish or codswallop when there is the possibility that it is you who could be wrong.