Actually couldn’t decide where to put this post and decided for this forum.
Find this really interesting…especially remebering Taken series thread :D.
No, to be serious: here is a serious approach as far as I can estimate…
Fermis Paradoxon explanation: click the pic
look at this essay or article
http://www.calphysics.org/articles/JBIS.pdf
Source of the pdf is here: No. 132
Well, Ufologist will not agree as they believe there are enough proof for alien existence. 
However, I think this could be seen as a demonstration that, in spite of Theory of Relativity, space travellings are not possible, whatever is the technology level achieved. 
May be I’m wrong, but I think only numbers are infinite, everything else has a limit. :rolleye:
S!
PS. Intersting post. :ani_beer: