What is Time and Space

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I'm sure there are better answers, but my short answer is that of course the universe can have no one size or age from all perspectives. That's what relativity tells us. The amount of time that has passed between events, and the amount of space that exists between two points, is relative to the observer's reference frame. There is no one right answer.

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Interesting. I think we can have one age.

So do I.
Perhaps when we discover observers somewhere other than on and right near earth, we can worry about what we think they might observe somewhere far away!Maybe if less money was spent theorizing, and more on the observers we know we do have here on earth, we would be better off?