Originally Posted By: Bill S.
Could be I go it wrong, but I thought that travelling backwards through time was something that went with FTL travel. Why might it apply to one thing, but not another?

The difference is that the neutrinos would still be traveling at or below light speed in the bulk, it is just that light speed in the bulk is much higher than light speed in the brane. So when they dropped back into the brane they would appear, to us, to have been traveling FTL.

Of course the whole idea of branes is speculative at present. You have to accept a lot of ideas that have not been shown to have anything to do with the real universe.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.