Since there are so many knowledgeable forumites, this new thread deals with questions we'd like answers to without going to the trouble of looking it up ourselves. An example would be "What is the origin of Groundhog's Day?" This is more for fun and to explore all our collective knowledge than for exploring our research skills, though if we get stuck, I'm sure a citation or two will follow.
The only "rule" is - as if anyone around here follows rules - that it's a reasonable question about factual information, not opinion, and that it's answered from what someone already knows without doing any research.