Many articles could use a plain-language introduction, and I think it is even the policy that they should have one. But as an "expert", I've found one of the a

Many articles could use a plain-language introduction, and I think it is even the policy that they should have one. But as an "expert", I've found one of the articles they mention - Electroweak Symmetry Breaking - really useful, "gnarly formulas" and all. At least I read it when learning particle physics, and I used it to double check the formula for (gamma, Z0) in my thesis. There are many things I don't like about Wikipedia, but I do like that articles often have technical depth - and you can always read related articles or references if you need more context.