Andy Chalk said:
But the truth is that the whole process will probably be a lot more mundane: an exchange of radio signals followed by bureaucratic deliberations about whether or not it's worth the hassle of trying to make some kind of intergalactic hook-up, and then finally, a press conference.
I don't know ... whilst radio communication would possibly be the first evidence of extraterrestrial life, I think given the amount of spatial phenomena that could impede proper communications (not to mention the huge amount of time it takes for radio signals to actuallybe transmitted) it's unlikely.
If there is an extraterrestrial intelligence with a possibly billion years headstart on us due to some freak natural occurrence that allowed another planet in another system to develop life at a greater pace then it took our little orb I think it's more than feasible that an alien intelligence is morelikely to just 'drop in' rather than communicate via radio.
I mean assuming that faster than light works as well as theory when transitioning into practice, would you rather send a radio wave back to a distant star system(Earth in this case) and wait tens of thousands of years to hear a reply, or merely just drop in and visit?
Let's assume that an alien race has far greater capacity for patience than we, it's possible that they may just wait (and hope) that not only the message is getting through (to us) but al;so hope that we have the sufficient means to translate (or even just manage to receive it) and recognize it for what it is, rather than dismissing it as possible background interference from satellites ala the 'Wow! Signal'.
But if we are assuming that these aliens resemble our noble selves in character and reasoning, it is far more likely they will just pay us a visit as opposed to waiting.