Considering the overall behavior of the particle system, I'm wondering whether others might also agree that the case for matter/antimatter annihilation cannot be considered as open and shut as we presently assume. Why should a positron and electron annihilate each other? What additional destructive force could cause the presumed annihilation... or at least the particles' decay to pure energy? What if the positron and electron bind together instead, as they should, and as any two oppositely charged particles do? If so, and because they're of equal mass and charge, they would rather absorb each others' charge equally and thus render themselves undetectable. At least by our current capability to detect particles. H2 molecules are barely detected in space (but we now know they exist in abundance) because their assembly and equal opposite charges of their components render them undetectable to us. Why shouldn't a positron and electron behave the same? There is nothing especially destructive or powerful enough about a positron to cause it to annihilate an electron. It is simply a positively charged electron, nothing else.