>>Also flawed is the assumption that since we humans find it impossible to get out there (out of our solar system) it must also be impossible for aliens to do the same. Well, if they had a million years head start I'd say they have a good chance of doing it!!
>
>Equally possible is the idea that we have a million years headstart over anyone else.

I think I heard or read somewhere that our solar system is relatively young in universe terms.

My personal opinion - I think they're already here. At least a few of the thousands of eyewitness accounts by pilots, abductions, etc. are probably true.
I think it's also possible they planted us here :)