Expansion of matter
Actually editor 161.28.196.13 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.