You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20060721064244" timestamp="2006-07-21T06:42:44Z" ns="0" title="Scratch Pad" />
        <page value="20060721070554" timestamp="2006-07-21T07:05:54Z" ns="0" title="Main Page" />
        <page value="20060721202733" timestamp="2006-07-21T20:27:33Z" ns="0" title="DSpam File Permissions" />
        <page value="20060729061747" timestamp="2006-07-29T06:17:47Z" ns="0" title="MySQL Install" />
        <page value="20060816212518" timestamp="2006-08-16T21:25:18Z" ns="0" title="SMTPD Recipient Restrictions" />
        <page value="20060924180243" timestamp="2006-09-24T18:02:43Z" ns="0" title="Ubuntu Desktop" />
        <page value="20061014004722" timestamp="2006-10-14T00:47:22Z" ns="0" title="Bounce Size Limit" />
        <page value="20061019192226" timestamp="2006-10-19T19:22:26Z" ns="0" title="Windows Restore Corrupted Desktop Icons" />
        <page value="20061112211254" timestamp="2006-11-12T21:12:54Z" ns="0" title="Gnome Remove Desktop Icons" />
        <page value="20061115083515" timestamp="2006-11-15T08:35:15Z" ns="0" title="MythTV SPDIF" />
      </results>
    </querypage>
  </query>
</api>