So far no one has made any observations to suggest otherwise. Everything at the edge of our vision (so billions of lightyears away) seems to be working according to the same principles we formed observing our immediate neighbourhood (the earth and solar system).
One of the main guiding ideas in physics is indeed that the laws of physics work the same everywhere, and it seems to hold.
There are some hints that maybe, just maybe, some things change in time, bit nothing concrete. If anyone actually gets proof of that, it’s an easy Nobel.
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