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="20140716061510" timestamp="2014-07-16T06:15:10Z" ns="0" title="Blockchain reorganization" />
        <page value="20140716063250" timestamp="2014-07-16T06:32:50Z" ns="0" title="Cycle time" />
        <page value="20140716063643" timestamp="2014-07-16T06:36:43Z" ns="0" title="Dynamic max block size" />
        <page value="20140716063935" timestamp="2014-07-16T06:39:35Z" ns="0" title="Fast forward" />
        <page value="20140716064042" timestamp="2014-07-16T06:40:42Z" ns="0" title="Functions of the blockchain" />
        <page value="20140716064253" timestamp="2014-07-16T06:42:53Z" ns="0" title="Inversion database" />
        <page value="20140716065515" timestamp="2014-07-16T06:55:15Z" ns="0" title="Master hash" />
        <page value="20140716081020" timestamp="2014-07-16T08:10:20Z" ns="0" title="3 core components" />
        <page value="20140716081118" timestamp="2014-07-16T08:11:18Z" ns="0" title="Mini-blockchain scheme" />
        <page value="20140716083255" timestamp="2014-07-16T08:32:55Z" ns="0" title="Network synchronization" />
      </results>
    </querypage>
  </query>
</api>