On page 25 the authors begin to discuss how medieval writers noticed how marvels seemed to appear on what was the edge of their world.  They say that they were talking about places like Ireland but also places to the east and south of the European continent.  I would assume that by this they mean the Pyramids and the Great Wall of China as 2 examples.  The line that I found most interesting was when they cited Ranulph Higden's observation about wonders.  He said, "At the farthest reaches of the world often occur new marvels and wonders as though Nature plays with greater freedom secretly at the edges of the world than she does openly and nearer us in the middle of the world."  (25)  This addresses human curiosity and preference to what is new and different.  The wonders found in new territories are much of the time of much more interesting than the ones you have known about for a while.

Another especially interesting parallel to wonders occurring on the edge of the world are religious texts.  When the world was separated by oceans, and long distances there was the edge of the world and wherever you were at that time was the only thing that one may have ever seen.  When pretty much everything was the edge of the world is when the majority of religions that are still adhered to today came to be. It seems that as the world became more connected was when these new texts stopped being adhered to.  This definitely has something to do with skepticism and other critiques of religion were first common.   Still today whenever someone today says they have found a new religious text they are seen as a lunatic or at least eccentric.  The connectedness of the world (aka the edges of the world becoming the part of the center) and the sharing of massive amounts of information is what has caused this.