I only just recently began my journey into the realm of physics, and I have a few questions. Forgive me if I suck at topic titles, and I'm not even sure where this would go... First of all, I've noticed several instances in which some form of decay results in antimatter apparently coming from matter. For example: β+, the positrons emitted in β decay. I thought antimatter and matter annihilated each other! Explain. My second question: What on earth is dark matter? In the simplest terms possible? Third, what exactly is the difference between the Higgs (which makes stuff heavy) and the Graviton (which... also makes stuff heavy)? Also, since each of the gauge bosons are "conductors" of the four fundamental forces, which force does the Higgs boson "conduct"? Fourth, is there any way that I can understand the Standard Model without learning too many complex things? Because it looks kind of like a long sting of meaningless symbols to me, I only recognize a couple of things in there. Fifth, can somebody explain string theory to me? Because I'm stuck at "everything is made of super-strings that vibrate and stuff".