Steve
When exploring ruins it always puzzled me that there was only one city, settlement etc per planet, unless you hit the jackpot of Abandoned cities, so would it be possible for the Xeno team to look for other salvageable ruins on the same planet, which are of equal or smaller size than the first find but still of use? E.g. you find a ruined city, then a settlement and perhaps a colony or outpost subsequently. However, I suspect this is difficult, since at the moment if you hit the ruins button more than once for a planet you just get the latest ruin.
When is new tech discovered in ruins, is it when R&D labs are recovered by the Engineers?
Regards