1. Can a proton be created in a particle accelerator that doesn't use protons? For instance, an "electron-positron" collider? I understand baryon number needs to be conserved, so this would necessitate the accompanying creation of an anti-proton, but I'm wondering if these colliders have enough energy to accomplish this and if it's routinely done, etc. If so, does the created proton and anti-proton just annihilate each other immediately, or can it happen that the created proton goes on to live a happy life for eternity whilst the created anti-proton annihilates with some other unlucky proton? 2. At the LHC, protons are smashed into each other which creats pure energy that reforms into "other" particles, such as the Higgs and a number of others. Are these protons lost forever? Again, since the baryon number must be conserved, how does the balance add up? What are we left with?