The study of genealogyfinding our roots–is a popular pastime these days. According to a 2012 study by market-research firm Global Industry Analysts, these searchers spent $2.3 billion on genealogy products and services last year, and membership in web-based genealogy sites has risen 54% since 2010, to more than 2 million But do you really want to know who your ancestors were? You may find some nasty folks back there in your family tree, and begin to wonder: Did they pass along their genes?
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