Does Space have Limits?

So I was watching the show "10 Ways to Destroy the Earth" on the History Channel and it got me thinking about space, which happens to boggle my mind more than anything else. As humans, we can't imagine anything without limits. Space has no limits. It doesn't end. If it did, than what is beyond it? It can't just be white space or nothing, it has to be something. But how does it go forever? How does it never end? And what did it start from and begin?

This led to even a more unfathomable question. How old is space? Does space have an age? If you think about space being there forever, how is that possible? You feel like it had to start sometime. But if it did start sometime, what was there before space? How can it just exist out of nothing?

It is impossible for us to imagine something with no beginning and no end. This is something that just can't be explained. We try to make reason out of everything. This cannot be explained and if its something we don't know how to explain but exists, doesn't that change the way you approach others things in life?