The magazine's long history is due to the popularity of the subject matter and the quality of writing which makes scientific information easily understandable. The longevity of the magazine makes it the oldest continuously operated monthly magazine in the United States. The top notch photos and graphics combine with excellent writing are what won Scientific American the American the National Magazine Award for General Excellence in 2011. Presently the print edition of Scientific American is read by more than five million people internationally. Over the years, many notable scientists have contributed articles to Scientific American Magazine including Albert Einstein and 144 Nobel Prize scientists. Rufus M. Porter, an inventor, was the creator of Scientific American. When it began the focus was on inventions and centered on new patents filed with the U. S. Patent Office. The magazine is now published around the world with editions in fourteen languages.