I've never used bitcoin but been reading the links which stoneFree and others have been providing.
I can't figure out what a bit coin is.
I gather that it exists in cyberspace, so it must be made from electrons somehow, and it is mined.
But how is "it" mined?
Who mines it, where and how?
What kind of equipment does the miner use and where are the mines?
Once it's mined, how is it placed in circulation?