After a consultation with a very nice person at Google, I have changed the locations and sizing of the ads on this site. Mobile users may see changes as well. I am hoping that this will improve my earnings while not interfering with your enjoyment of the site.
The Google rep encouraged me to insert ads within the articles, as many other sites do, but I resisted this as I find it annoying. I plan to leave this in place for a few weeks to see if it helps, and I welcome your comments and suggestions.