First of all Geiri I think you did mean the where does the 'universe' end - don't worry, you probably just got your English mixed up.
And they're all very good and interesting questions - I'd be surprised if there wasn't anyone here who had wondered those things before, and I don't think anybody can really prove them for sure.
Probably the easiest question to answer is the size of the universe one - I think that outside of it is just... nothing. As in no atoms, molecules etc. once you get passed all the stars, asteroids etc. I've read one theory where scientists say the universe is constantly expanding, then it will get to a point where it will start shrinking again, until it explodes (don't worry, trillions of years away

), and then it expands again, and the cycle starts again. Interesting theory anyway - all to do with gravity and other forces etc...
I doubt we live in a Truman or Matrix world - it is a bit of a freaky thought, but I really don't think so... But then again I could just be telling you that so you don't try to escape.
I'll have to say I believe in God and an afterlife but as to who made God..... *shrugs* Well, if we knew that would just spoil all the mystery wouldn't it!
