If you are thinking about how much you enjoyed reading about the upcoming Lancaster County Historical Society photo exhibit in this column, you are engaging in nanostalgia, as defined by Jim Taylor and Watts Wacker in their new book, "The 500-Year Delta: What Happens After What Comes Next." --Jack Brubaker, "What's really happening in this picture and who are all these people?", Lancaster New Era, May 23, 1997