Hi<br />I think I know what you are getting at, but there are some terms that you have to clarify for us first.<br /><br />To start with, by saying "space" you mean the universe correct? From my understanding, we live in a experimentally verifiable 4 dimensional universe. We can move up and down, to the left and right, backwards and forwards, and a combination of all those in between. Then you add time in order to note changes in those positions in a fluid state. Mathematically constructed ideas (string theory) state we live in at least 10 dimensions with the familiar 4 the only ones we can currently probe with our technology. <br /> The universe is expanding, at varying rates throughout its history. Violently at first (the big bang), then slowly, and recently accelerating (I think the figure was about 7 billion years ago is when it started to speed up again). <br /> From my understanding, we live in at least 4 dimensions, but possible more if the stringers are correct.<br /> The expansion of the universe would not be unlimited (that is if the big bang theory is correct). The expansion has a finite history, though to measure an end to it is a different item entirely. Your analogy of the "rapidly expanding balloon" and "explosion" is comparing 2 similar things. If a balloon blows up too rapidly, an explosion is the result. <br /><br />I think your question is, please correct me if I am wrong - If the universe is expanding (the 3 spatial dimensions) then are the other dimensions (time or the string theory-proposed 6 others) getting larger as well? Is that your idea?<br /><br /><br /><br />