exposed unicode, HTML, or XML

I have received this email from Apple News:

Channel: Science & Technology Research News
URL: http://www.scienceandtechnologyresearchnews.com
Dear Raymond Rasmussen,
We’ve noticed a problem with your channel. Until the problem is resolved, new content won’t appear in your channel. Please resolve these issues and go to News Publisher to resubmit your channel for approval.
Channel content contains exposed unicode, HTML, or XML.
Regards,
The Apple News Team

I have searched the forum but am unable to find anything regarding exposed unicode, HTML, or XML.

Any suggestions on how to fix this?

Thanks

Ray

The page I need help with: [log in to see the link]