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I read a book a few years ago called 'Reletivity Visualized'
http://www.amazon.com/exec/obidos/tg/detail/-/093521805X/qid=1054763330/sr=1-1/ref=sr_1_1/102-6295499-4897711?v=glance&s=books
It was written for laymen and provided nice analogies and models for these concepts. In reguard to time dialation I believe that the model provided was this:
You always travel through spacetime at the speed of light. when you are at rest in 3-space you are traveling through time at the speed of light. when you move through 3-space the speed you are moving at is subtracted from the speed you are traveling through time at. You notice nothing either way even if you are traveling through 3-space at a large % of light speed. People moving relative to you notice this.
This may be incorect. I would recomend the book for a more accurate description.
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