I'm not really surprised that there are natural sources of antimatter in the universe. We create antiparticles on a regular basis in our colliders, so when you think of the really energetic reactions taking place in and around black holes and white dwarfs and supernovae I would expect them to be created there. The part of the story I referenced that I thought was doubtful was that there are vast volumes of antimatter existing in the voids that we find on large scales. I can't believe that such large amounts would exist without leaving traces that can be found in our observations.

Bill Gill

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