(via agade list)
http://www.heritagedaily.com/2012/06/puzzle-of-palmyra-in-syrian-desert-solved/
Thanks, Mark, very interesting if annoyingly non-specific. Did they find villages only from Roman times? How old was the reservoir system, and when did it cease functioning? I suppose the data may simply not tell them all that.
Also (not much more help though) from Explorator:
http://phys.org/news/2012-06-roman-empire-historical-mystery.html
http://www.pasthorizonspr.com/index.php/archives/06/2012/researchers-solve-mystery-of-palmyra