When calculating distances one often makes a reference to the debate about the chances of alien life existing.  Most people, not everyone thinks it is likely.  Here is one comment from the video thread:

This should pretty much silence any non believers of alien life, there is absolutely at least one intelligent species per galaxy, there is at least one singular planet that is in the “just lucky enough to form a biosphere” part of some random star, even as absurdly low as the chances may be, the galaxy is tenfold absurdly huge, there would be almost no way even if there was intelligent life in the Andromeda system we would even be able to detect each other in almost any way shape or form due to the stupidly large distance between us, might as well exist in another dimension.

What do you think?  Feel free to comment with your ideas on the subject and we hope you like the video.

thanks to ESO for the pic