If you have text in the subject title or content that is popular the web search engine spider thingys pick up on it and index it so that when peeps Google stuff yours comes up as a hit.
I think.
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http://davidbearphotography.com/

"If it turns out that President Barack Obama can make a deal with the most intransigent, hard-line, unreasonable, totalitarian mullahs in the world but not with Republicans? Maybe he’s not the problem."