Hi, I've been doing the very basics of special relativity lately,and there seem to be some points that most people I know don't really understand or know for certain.As a result I've been completely confused about them,and I could really do with some expert help on them. Firstly, in my book it says that all the results of special relativity ultimately owe their existance to the relativity of simultaneity.However, thinking about the famous train platform thought experiment I can't get down to explaining time dilation with it. Also,in the muon experiment(which everyone must be knowing,so I won't describe it),I see the muon's clock to be running slow,so I see it living longer than it should (in my frame of reference). But the strange thing is that the muon actually doesn't have a clock (which I can observe) to help me detect its slowly running time!!! So how do I know (without the muon actually having any clock on it) that its time is really running slow???? The fact is that anyone--even one who doesn't have any knowlege of special relativity whatsoever sees this pheomeon occur and can easily see that the muons survive longer than they should,if allowed to. Please help me out in this.