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="20100925192229" timestamp="2010-09-25T19:22:29Z" ns="0" title="Sandbox" />
        <page value="20101020181328" timestamp="2010-10-20T18:13:28Z" ns="0" title="Dihedral debugging" />
        <page value="20101031212048" timestamp="2010-10-31T21:20:48Z" ns="0" title="Golygons" />
        <page value="20101124160228" timestamp="2010-11-24T16:02:28Z" ns="0" title="Why did insects win?" />
        <page value="20101210223654" timestamp="2010-12-10T22:36:54Z" ns="0" title="Johann Sebastian Bongartz" />
        <page value="20101214024526" timestamp="2010-12-14T02:45:26Z" ns="0" title="Concetta Chiara Inzerillo" />
        <page value="20101225144809" timestamp="2010-12-25T14:48:09Z" ns="0" title="Tuomas Varnsson" />
        <page value="20101226144547" timestamp="2010-12-26T14:45:47Z" ns="0" title="Lidia Vaitarosa" />
        <page value="20110123124635" timestamp="2011-01-23T12:46:35Z" ns="0" title="Archimedes Plutonium" />
        <page value="20110129185848" timestamp="2011-01-29T18:58:48Z" ns="0" title="Find unsecured IP cameras" />
      </results>
    </querypage>
  </query>
</api>