time dilation

I don’t understand why it’s claimed that time dilation would equate to a form of time travel. Time dilation would cause an aging rate differential but that can be achieved without time dilation. A person that ages slower or lives longer than another doesn’t time travel in to the others future...

Some very spiffy work out of the National Institute of Standards and Technology: Scientists there have measured the special relativistic time dilation of high precision optical clocks at the impressively slow speed of about 20 miles per hour. They have also used the same high precision clocks to...

If not - Why not? If so - How can it travel at all relative to an observer, let alone travel at c?

WARNING - written by a layman. As well as time dilation slowing the rate that clocks run and things age etc, wouldn’t it also slow the rate of the very speed that was causing the time dilation? Isn’t time dilation effectively speed dilation? In other words, the faster you go the slower you go...

(I can here the moans from around the world :-) It seems to me that Relativity is claiming that observing the reality of one rest frame, from the reality of another rest frame, creates a new and different reality of the observed reality. To explain what I mean I will use the light clock...

I don’t understand why, in some Relativity experiments, a clock slowing down is interpreted as being time per se slowing down (time dilation). We use clocks to measure time, but clocks aren’t time. What has a clock slowing down got to do with time slowing down? All clocks are mechanical and...

Gravity is the equivalent of acceleration, according to SR. No test can tell the difference. Gravity has been shown, in accordance with GR, to cause time dialation. GPS clocks are set to accommodate for the fact that they're not as far down in earth's "gravity well." Clocks run faster out in...