This is a mind bending theory. I have to admit that I have a difficult time grasping it. I understand it in principle, but I just can't groke it. I first came across it in the following youtube video, and I was delighted to read your explanation:
Relativity is by far, the most successful theory that actually describes reality. Reality is mind bending indeed. 😁 I've seen that one before. I like that guy's videos, informative with timelines and backgrounds about the subjects. Here's another one about this subject that I've seen, if you like watching physics vids.
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