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="20130225172628" timestamp="2013-02-25T17:26:28Z" ns="0" title="mediawiki error CryptRand.php" />
        <page value="20130225173209" timestamp="2013-02-25T17:32:09Z" ns="0" title="android openvpn howto" />
        <page value="20130225173247" timestamp="2013-02-25T17:32:47Z" ns="0" title="android stay awake display setting" />
        <page value="20130225173353" timestamp="2013-02-25T17:33:53Z" ns="0" title="awk field separators" />
        <page value="20130225173438" timestamp="2013-02-25T17:34:38Z" ns="0" title="bash adding to path" />
        <page value="20130225173611" timestamp="2013-02-25T17:36:11Z" ns="0" title="bash comparison operators" />
        <page value="20130225173644" timestamp="2013-02-25T17:36:44Z" ns="0" title="bash ping ip range" />
        <page value="20130225180222" timestamp="2013-02-25T18:02:22Z" ns="0" title="inodes" />
        <page value="20130225185740" timestamp="2013-02-25T18:57:40Z" ns="0" title="Checking hard disks for bad blocks" />
        <page value="20130225190123" timestamp="2013-02-25T19:01:23Z" ns="0" title="Vpnc disable dead peer detection" />
      </results>
    </querypage>
  </query>
</api>