Use Safari's somewhat undocumented Snap Back feature.
Mark the page that you are going to want to view again by typing
cmd-opt-k to mark it for snap back.
View your article and when you're done, type
cmd-opt-p to snap back to the page you marked.
This only works within the same site - you can't mark the discusion and then go visit apple.com and snap back to the forum list at macnn.com.
You can, however, snap back to Google search results from anywhere -
cmd-opt-s and URLs that you manually enter are automatically marked for snap-back.
I think this feature is cool as hell and I had a hard time finding out how to use it as the Safari Help menu didnt list it.
Apples Safari site glosses over the feature without much detail.
SnapBack to it
Safari delivers the attention to detail you expect from Apple. Take the space-saving progress bar integrated directly in the address field, for instance. Or the innovative SnapBack technology. SnapBack works like a breadcrumb trail to lead you back to where you started. The very nature of the Web leads you from one page to the next and before you know it, you’ve wandered far afield. The SnapBack button returns you to the point where you last typed a URL or selected a bookmark.