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="20070322083506" timestamp="2007-03-22T08:35:06Z" ns="0" title="Метеоритный кратер" />
        <page value="20070322141843" timestamp="2007-03-22T14:18:43Z" ns="0" title="Озеро Чёрное" />
        <page value="20070708214809" timestamp="2007-07-08T21:48:09Z" ns="0" title="Чай в СССР" />
        <page value="20070718072351" timestamp="2007-07-18T07:23:51Z" ns="0" title="1876" />
        <page value="20070718072438" timestamp="2007-07-18T07:24:38Z" ns="0" title="1895" />
        <page value="20070718155107" timestamp="2007-07-18T15:51:07Z" ns="0" title="Alter ego" />
        <page value="20070718155312" timestamp="2007-07-18T15:53:12Z" ns="0" title="Archive.org" />
        <page value="20070718155948" timestamp="2007-07-18T15:59:48Z" ns="0" title="Casus belli" />
        <page value="20070719141316" timestamp="2007-07-19T14:13:16Z" ns="0" title="DICOM" />
        <page value="20070719141436" timestamp="2007-07-19T14:14:36Z" ns="0" title="Deus ex machina" />
      </results>
    </querypage>
  </query>
</api>