Okay, you're right. I was thinking of the Standard Model as more of a moving target that incorporates everything we know about the fundamental particles and th

Okay, you're right. I was thinking of the Standard Model as more of a moving target that incorporates everything we know about the fundamental particles and their forces. I thought the model started with a smaller number of particles [photon, electron, neutrino, muon neutrino, up quark, down quark, strange quark, gluon] and was expanded over time [higgs in 64, w/z bosons in 68, charm in 70, top/bottom in 73]. After further investigation it looks like no one actually called it the "Standard Model" until all of the 17 particles known today were included, so technically there have been no new particles added to the "Standard Model" I think considering the Standard Model a moving target is still reasonable since if a new fundamental particle were to be discovered tomorrow, we would very likely just add it to the Standard Model and still call the new version the "Standard Model". However, I also realize now that treating it in this way is probably not appropriate given the context of mojoe's original question. I would edit my original comment to retract what I've said, but it seems I took too long to recognize my mistake and it will be forever immortalized in hacker news history :(