Isotope, in chemistry, one of two or more forms of an element that have the same atomic number but different atomic weights.
Imagine walking through a field and stumbling upon scads of corpses, all in various states of decomposition. It's not the setting for your next nightmare, but rather a very real discipline of forensic anthropology.
Who wants to reduce our complicated universe down to its simplest building blocks? A bunch of particle physicists, that's who. Why is the Higgs boson critical to that goal?