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As far as we know as of now, the universe is flat. Now anyone who has ever taken geometry knows what that means, the universe as we know it is a plane. Now this is odd to some people because if that is so where is the edge of the universe? It is not like we are going to find a sign saying, "Stop Universe Ends Here". So more and more scientists are now thinking there is more than one universe. Because if space is infinite then odds are if you keep going far enough you'll eventually come across copies of Earth, may be even copies of yourself with only one small difference. The idea of parallel universes has put into sci-fi ever since the idea was first laughed it back in the 1950's. But now we are finding new evidence that parallel universes may actually exist.

There is two mean ways people look at multiple universes, 1) they are parallel universes and rarely interact with one another because each makes its own space as it grows or 2) the multiple universes do at times interact with each other and sometime crash into each other, one of the newer ideas now is that your universe was made when two or more universes crashed into each other making the "Big Bang".

Now, some people ever since prehistory has believed that our world or universe is a nexus or in a nexus. Meaning that out universe has a connection to other nearby universes and when the barrier between the universes are weaken things can past from one world or universe to the next.

So, the whole idea of there being more one universe is older than history itself. It is nothing new, it is just a case of what's old becoming new again as it is seen in a different light.

Endless wouldn't necessarily imply infinite.

If you tried to answer that question from the viewpoint of a twodimensional being living on a ball, his universe would have no end, no matter in which direction he'd be going he could travel into this direction for ever. His universe would have a welldefined size though. And I would think that for him there is no beyond the universe that he could experience with his senses. So as far as i can think there is also no answer we could find for the question what's beyond our universe. Our "Ball" could floot in milk, be in a vacuum or something else and with all our means there's nothing we could really conclude about it.

it is simple there can only be dark with light so if the stars or dark matter or black holes or quasers or anything else that emits light waves(yes black holes emit radio waves) when it moves away it creates more dark expanding distances

Huh, the fact you say "universe" brings up an issue for me, because, I am a firm believer in a Multiverse ... so to answer your question, what is beyond the universe we live in ... are other universes, thus creating a vast and wide Multiverse ... just time and space overlapping and folding around each other contained by gravity and other forces of Nature ...

This may seem wierd, but the Universe is not just the space we live in; people make up the universe. In that case, the universe is growing. The universe is all that there is, there is nothing outside of it.
Imagine it like this. Say that colors are the universe. There are some primary colors, then subordinate colors, then other colors that a basically different shades or tones on the ones before them. Now, try thinking of a color that you have not yet seen before.
It is impossible; the colors we have a basically all that is available for the human mind to comprehend. We cannot expand our colors any further; all we would get would be different shades or colors. The universe is everything.
There is nothing outside of the universe as far as we know. I have done studies and come up with the statement that all that lies beyond the universe is nothing. This is faulty; nothing is simply a term used to descibe absence, which means that there is not anything. The universe, and everything in it, is a thing. Other than that, there is absence of things.

as i understand it there is nothing beyond the universe, quite literally nothing. If you were ever to reach the edge (despite that being said to be impossible) you'd come out on the other side or something. Of course i'm talking about physical movement, alternate realities, dimensions etc. are totally different.

The expansion of the Universe comes from the fact that all the galaxies (as seen from the Earth) are in redshift. The statement is that the distances between galaxies or clusters of galaxies are continuously increasing and that therefore the universe is expanding because everything is moving away from each other.

It is more like a balloon than a sheet of paper. Draw some dots on a balloon and then inflate it. As the balloon inflates the all the dot move away from each other. But if the balloon deflates all the dots move toward each other. At the moment all the galaxies are moving away from each other so therefore the Universe is expanding, ie it is growing.

Note: Red Shift and Blue Shift are caused by the Doppler effect. Red Shift = moving away from you and Blue Shift = moving toward you.