I viewed this website on a mobile phone and found out that yes it is responsive - the site fits to the phone, tablets' screen perfectly but the 'PAGE CATEGORIES' and the 'OTHER TOPICS' navigation tools do not show-up. I highly recommend it be viewed on WEB VERSION - the button is located at the bottom of the post/posts - just click an the whole page with the complete details appear. You can now select the topics you wanted to read about.
There are a lot more post on every page category only 10 posts are shown on a page. Click older posts at the bottom of the last post (means if a page contains 100 posts - 10 pages are available for viewing).