 Rather than expecting people to know about the growing number of Web archives, and to guess which archive might hold an older version of the resource they’re looking for, Memento proposes to make archived content discoverable via the original URL that the searcher already knew about.Essentially, Memento is an attempt to permit users to view any web page as it looked on a given date in the past.A variety of web archives exist, collecting specific revisions of web pages as they existed at a particular point in time.