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="20150414131511" timestamp="2015-04-14T13:15:11Z" ns="0" title="Temporal Bacteria" />
        <page value="20150521071215" timestamp="2015-05-21T07:12:15Z" ns="0" title="Neural Mosquito" />
        <page value="20150521072200" timestamp="2015-05-21T07:22:00Z" ns="0" title="Mirror Octopus" />
        <page value="20150522135640" timestamp="2015-05-22T13:56:40Z" ns="0" title="Emerald Tide" />
        <page value="20150522135815" timestamp="2015-05-22T13:58:15Z" ns="0" title="Higgins" />
        <page value="20150522141737" timestamp="2015-05-22T14:17:37Z" ns="0" title="Command" />
        <page value="20150526003123" timestamp="2015-05-26T00:31:23Z" ns="0" title="Earth 44" />
        <page value="20150526010733" timestamp="2015-05-26T01:07:33Z" ns="0" title="Darkness Entity" />
        <page value="20150526011531" timestamp="2015-05-26T01:15:31Z" ns="0" title="Cleansing Fire" />
        <page value="20150526011651" timestamp="2015-05-26T01:16:51Z" ns="0" title="Living Gas Entity" />
      </results>
    </querypage>
  </query>
</api>