One of the major open questions of particle physics is the existence of matter in the universe. At the time of the big bang, matter and antimatter were to supposed to have existed in equal quantities. What happened? One thought I had (from out of nowhere) is that they do exist in equal amounts (numerically, not in mass), but we have been looking in the wrong place. My hypothesis is that electrons are antimatter. Moreover, the neutrinoes that are around are also antimatter. As a result there is a number balance. However, because of a yet to be discovered mechanism, the antiquarks or some predecessor antiparticles decayed into electrons and antineutrinoes, while the corresponding particles did not. This just wild guessing - I have no evidence for it.