I'm far from an expert, but one thing I've figured out already. Those who played pre-release versions were right. It is very important to explore. I'm building two explorers first thing, which gives me three. I then beeline down the prosperity tree to the virtue that gives your explorers three expeditions. So far it has worked beautifully. I'm only playing on Gemini level right now, but I'm scarfing up more than my share of resources, crash sites, etc. As a result, in one game I got nine artifacts before turn 100. That was sweet! By the way, that refers to CivBERT, not the generic CivBE.