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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="20130925082416" timestamp="2013-09-25T08:24:16Z" ns="0" title="December 29, 1997" />
        <page value="20131001085100" timestamp="2013-10-01T08:51:00Z" ns="0" title="Since 1997" />
        <page value="20140204015422" timestamp="2014-02-04T01:54:22Z" ns="0" title="Philosophical Questions Raised While Worldbuilding For Video Games" />
        <page value="20140728221541" timestamp="2014-07-28T22:15:41Z" ns="0" title="Core" />
        <page value="20140803075110" timestamp="2014-08-03T07:51:10Z" ns="0" title="Miscellaneous Sandbox Testing" />
        <page value="20150901042446" timestamp="2015-09-01T04:24:46Z" ns="0" title="Status Effects" />
        <page value="20150901053628" timestamp="2015-09-01T05:36:28Z" ns="0" title="Musical Inspirations" />
        <page value="20150907134858" timestamp="2015-09-07T13:48:58Z" ns="0" title="Designs in Progress" />
        <page value="20150907135218" timestamp="2015-09-07T13:52:18Z" ns="0" title="Main Page" />
        <page value="20150908041556" timestamp="2015-09-08T04:15:56Z" ns="0" title="Mana" />
      </results>
    </querypage>
  </query>
</api>