I was introduced to role-playing games in the early '80s. As a consequence, I have a number of worlds, whose history I can describe in detail (I even included the reason why, in my D&D world, people can wander in from completely unconnected games, and there are occasional technological artifacts).
My superhero world includes the idea of heroes voluntarily registering with the Bureau of Transhuman Affairs, which among other things provides a way to link a superhero name and bioverification with a coded file, so that, say, Frostfire can be identified in court without compromising his civilian identity or needing to take off his mask. (Telepathic evidence is not considered admissible in court; possession of energy-projecting powers is regarded in some jurisdictions as being equivalent to possessing a concealed weapon, and requires special licensing if they're ever used.)
I've worked out what's going on in the Pacific Northwest in the new version of White Wolf's World of Darkness, after having gone ot the trouble of assembling a complete Seattle By Night for the old version. (The new one doesn't have the werewolves and vampires at each other's throats for mystical reasons, but rather as a matter of territory. There are no thousand-year-old vampire princes - in the new version, anyone that old is regarded as probably hopelessly insane. And other such changes.)
I'm currently working on the adventures of the Intrepid-class long-range scoutship Meriwether Lewis, of the United Federation of Planets Starfleet, as it explores the Gamma Quadrant of the galaxy.
Is that enough?
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Sodium is a metal that reacts explosively when exposed to water. Chlorine is a gas that'll kill you dead in moments. Together they make my fries taste good.