>Even traveling at the speed of light is instantaneous communication... from the photon's frame of reference. Photons don't have a frame of reference. It makes

>Even traveling at the speed of light is instantaneous communication... from the photon's frame of reference. Photons don't have a frame of reference. It makes no sense, in relativity, to talk about a frame in which a photon is at rest, and trying to talk about them only leads to nonsense. I say this not to nitpick, but because the fact that you're trying to use the concept suggests to me that your grasp on relativity might not be that strong. >But that doesn't mean that if these neutrinos were traveling 3.7 miles per second faster than light that it would enable instantaneous communication. C + 3.7 miles per second would still take a long time to travel interstellar distances. An object travelling at c+3.7mps in your reference frame is travelling at infinity miles per second in some other (sensible, subluminal) reference frame, that's the point. This is all undergrad-level stuff.