expansion of matter actually editor was attempting to make a pretty good point though it was somewhat unpolished i think what he was trying to point out was that the dimensions of quantum particles are determined by fundamental constants which are thought to be stable over time that is a proton today has the same radius it had when it was created i don't think the article's phrase expansion of space and matter intended to mean that these particles are a different size than they were previously but it is unclear and could be construed that way so a rephrase of that statement would be beneficial