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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="20080923055508" timestamp="2008-09-23T05:55:08Z" ns="0" title="Sustainable World" />
        <page value="20080925061537" timestamp="2008-09-25T06:15:37Z" ns="0" title="Sustainable World Transportation System" />
        <page value="20080927154813" timestamp="2008-09-27T15:48:13Z" ns="0" title="Low Energy Trains" />
        <page value="20081003065509" timestamp="2008-10-03T06:55:09Z" ns="0" title="Pedelecs" />
        <page value="20081003071835" timestamp="2008-10-03T07:18:35Z" ns="0" title="Bio Fuel Driven Lorries" />
        <page value="20081015061549" timestamp="2008-10-15T06:15:49Z" ns="0" title="Cave World" />
        <page value="20081206081651" timestamp="2008-12-06T08:16:51Z" ns="0" title="One-World" />
        <page value="20110812193120" timestamp="2011-08-12T19:31:20Z" ns="0" title="Orwell&#039;s World" />
        <page value="20110812200002" timestamp="2011-08-12T20:00:02Z" ns="0" title="Sustainable World Constitution" />
        <page value="20110812201149" timestamp="2011-08-12T20:11:49Z" ns="0" title="Cave World Political System" />
      </results>
    </querypage>
  </query>
</api>