I had an idea for a story, and what I want to do is have it set in real places. I'm not sure where yet; potentially Chicago. But that's irrelevant. The story would bring in a fantasy element. What I want to do is have this element be known to the public - something that came out and we discovered existed. But I don't want to set this story in the year 2094, either. Would it work to not mention when the story takes place (though details would show it's pretty modern), but also not mention when exactly they discover was made? Just elude to the fact that there was a discovery made?