[crtified]

Side-thought: I have at times wished Google had a time machine function, for example, "show me the results that this search would have returned in 2008".

It would open up a whole new world of chronological meta analysis; a new dimension of cross-referencing.

[I understand that Google has, or had, some limited incarnation of this, in the form of it's Time Range search, but - and without looking deeply into it - I suspect that is an algorithmically different procedure than the one I am describing. That is, I expect that applies a simple filter to a current search, rather than being The Actual Old Search Results]