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Again, as I understand it, there is no proof that photons are massless;
and if they are massless, maybe they would not interact with spacetime,
and ignore the curves and sail straight through them without deviating. Just
another thought to toss into the cauldron of complexity that is the
universe. I suppose the fact that photons travel at the speed that they do
comes close to proof of their mass,[assuming that relativity is correct, that is].
raymo
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