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="20060816062413" timestamp="2006-08-16T06:24:13Z" ns="0" title="Second Life" />
        <page value="20061003051456" timestamp="2006-10-03T05:14:56Z" ns="0" title="War in the Valstock Mountains" />
        <page value="20061003053134" timestamp="2006-10-03T05:31:34Z" ns="0" title="Valstock Mountains" />
        <page value="20061018042312" timestamp="2006-10-18T04:23:12Z" ns="0" title="Desert Wyvern (Hatchling)" />
        <page value="20061029081020" timestamp="2006-10-29T08:10:20Z" ns="0" title="Dracolich Release Guide" />
        <page value="20061115185628" timestamp="2006-11-15T18:56:28Z" ns="0" title="A Brief Poetic Guide to Dragon Mythology" />
        <page value="20061115185659" timestamp="2006-11-15T18:56:59Z" ns="0" title="Threads of Rhyme" />
        <page value="20061115185815" timestamp="2006-11-15T18:58:15Z" ns="0" title="Coronation of Kings" />
        <page value="20061121071605" timestamp="2006-11-21T07:16:05Z" ns="0" title="Silverbeak" />
        <page value="20061126061548" timestamp="2006-11-26T06:15:48Z" ns="0" title="Genie and the Dragon" />
      </results>
    </querypage>
  </query>
</api>