History+Tab

From here, you can view any page. As the manager of the site you can also revert back to a page. For example, if the July 15, 4:45 version is incorrect, you can click on the the Jul 15, 2007 4:17pm version and you'll see this option below: The last action says, "revert to this version."
 * The History tab allows you to see who edited a page and when.**

By clicking on revert, the page will now show the correct version.