Susan Gerhart, a professor at Embry-Riddle Aeronautical University, asks the question, Do Search Engines Suppress Controversy? For more information on this subject, check out her main page. The answer to her question: yes, to some extent search engines do not list controversial sites on search results. The lesson here is to make a change in your search parameters — as the author puts it, search more carefully for controversy — “actively seek the “darker side” when appropriate, by using more search engines, more diverse queries, and a greater number of search results.”