What would the universe look like to a Photon?  From Einstein’s perspective (vis. relativity), the universe would appear to be at a stand-still since the time-frame of the world outside the photon would be perpendicular to that of the photon, i.e. in stasis relative to the photon.  So, even though the photon is interacting with matter, does it see no change at all in the cosmos around it?  That seems unlikely as it must interact.  There seems to be a paradox.  Any physicist out there who can answer?

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