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If you haven't yet, you should definitely read the famous little scifi story Light of Other Days.

Full text: https://www.physics.utoronto.ca/~jharlow/slowglass.htm

Wow. Now that's nice. Someone thought outside our box for that story.

Part of the reason that I initially posted on this thread was to ponder the question about a world where mirrors have a memory function. A mirror with a memory would have perfect fidelity though the image would be a mirror image of reality, like looking into a replay from a mirror image universe. I wrote a poem on that subject a couple years ago and the whole question about photons and their potential infinite existence triggered the memory.

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