extra mechanism which you might've heard of called the higgs mechanism made after the physicist peter higgs, if you just wrote down the tier of massive particles would make nonsensical predictions at higher energies. it just wouldn't make sense. the theory can't be that possible. there has to be something more interesting going on in the more interesting thing is called the higgs mechanism which not explain in detail but i have a whole chapter where he really explain what it means in terms of particles of acquiring mass. in addition to that, there's another puzzle, which is particles get their mass, but why are the masses but they are? what sets the scale for the masses? in fact, it is a real puzzle if you just use quantum field eerie, which is what we use that combines together quantum mechanics to be particles of physics. it's what we do and we believe it's ray. if you calculate how have you think these should be, you would find there is a discrepancy of 16 orders of magnitude. so to make the theory work, looks like you have to do an enormous statue what we call fine-tuning. now, i'm glad