May I take this opportunity to spell out that, obviously, the series does not belong to me and that I would quite welcome if someone else were to write an entry.
I'd just like two things in that case:
-That we could have them all linked from a series heading. Not sure how to do that -we used to have occasional series but they seem to have gone.
-That the writer would contact me by email to let me know he's preparing that subject so I don't do it.

Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi