[Windflier]

So your saying that because there is no evidence of others being there is proof that they really are there?

Not really. I'm saying that just because we haven't been introduced, doesn't mean we don't have neighbors.

When European explorers first landed on Easter Island, the natives thought they were the only humans on earth. Same parallel. Just because we don't have the means to achieve interstellar travel, and no explorers have made their presence known, doesn't mean that we're all alone in the universe.

It comes down to simple logic. The fact that life arose on this one planet argues for the fact that it's possible for it to arise on others. Given the unfathomable vastness of the universe, and the nearly incalculable numbers of stars and planetary systems out there, it's a virtual certainty that life is common and abundant throughout the universe.

It's just that the distances between life bearing planets are unthinkably large. Only civilizations that have mastered faster-than-light-speed travel, even have a chance of finding intelligent life beyond their own solar systems. We're a long way from having such technology, but we'll get there. When we do, we're going to meet the neighbors.

[fella]

Back to the radio transmissions. Shouldn't there be thousands if not hundreds of thousands of civilizations just here in the good old Milky Way all of them developing and fading away at different rates so that at a stage of their development comparable to ours in radio that their transmissions would be reaching us now? Unless all that black matter that we can't account for is absorbing those transmissions we should have a large number of radio hot spots just in our own galaxy. If I remember correctly that is what they expected when they switched on that big radio telescope in Porto Rico.