Of course I don't know but I believe its probable they are or were here and I think it's quite a lot of bloody fucking nerve to say it couldn't be.
to answer the question of why would they still be using the same space ships now as they were thousands of years ago: maybe they havn't been home for thousands of years. Or don't have planned obselesence on thier planet. woops--i/m getting really fudked up now. good stuff! se ya!
P S--I really do believe!!