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="20100226045223" timestamp="2010-02-26T04:52:23Z" ns="0" title="Infoboxtest" />
        <page value="20100227025203" timestamp="2010-02-27T02:52:03Z" ns="0" title="Zoids: New Century" />
        <page value="20100307202656" timestamp="2010-03-07T20:26:56Z" ns="0" title="Zoids: The Battle Begins" />
        <page value="20100307211638" timestamp="2010-03-07T21:16:38Z" ns="0" title="Zoids Densetsu" />
        <page value="20100307214019" timestamp="2010-03-07T21:40:19Z" ns="0" title="Zoids Mokushiroku" />
        <page value="20100307214104" timestamp="2010-03-07T21:41:04Z" ns="0" title="Zoids Chuuou Tairiku no Tatakai" />
        <page value="20100307222056" timestamp="2010-03-07T22:20:56Z" ns="0" title="Zoids Full Metal Clash" />
        <page value="20100307222222" timestamp="2010-03-07T22:22:22Z" ns="0" title="Cyber Drive Zoids" />
        <page value="20101004132345" timestamp="2010-10-04T13:23:45Z" ns="0" title="Zoids Saga III: Fuzors" />
        <page value="20101004203029" timestamp="2010-10-04T20:30:29Z" ns="0" title="Zoids" />
      </results>
    </querypage>
  </query>
</api>