WIKIPEDIA (WWW.WIKIPEDIA.ORG) is a freely available online encyclopedia anyone can edit, contributing changes, as well as articles. 10 With more than a million entries, hundreds of thousands of contributors, and tens of millions of fully recorded article revisions, Wikipedia’s freely available database has also made it possible to study how human knowledge is recorded and organized through an open collaborative process. Although citation analysis 6 can establish how new research builds on existing publications, the fully recorded evolutionary development of Wikipedia’s