How to Get Rid of Duplicate Content Captured on Article Lists

[jwanner]

We have a ton of articles and blog posts on our site.  Currently, we display summary lists of articles that contain the first paragraph of the article in the summary list.  However, in my reports, this is coming back as duplicate content with the full article itself.  How do I fix this?

Ex: article main page- http://www.robots.com/articles/10

First article on that page- http://www.robots.com/articles/viewing/grippers-for-robots (which shows up as duplicate content with the main artilce page).

With our blogs, we have the most recent 5 blogs (in the same summary format) listed on our main blog page.  We then have categories that people can sort by.  But again, this is causing us duplicate content because those pages show the first paragraph of the blogs related to that category.

Ex:  blog main page- http://www.robots.com/blog.

First blog listed on that page- http://www.robots.com/blog/viewing/robots-and-automation-bringing-jobs-back-to-the-united-states (which then shows as duplicate content with the main blog page).

And then you can also select categories to see related topics: http://www.robots.com/blog/category/buying-a-robot which is showing as duplicate content also.

Help!  How can I prevent this?

Thanks!

JWanner

[jwanner]

added some examples to give some clarity to what I mean.    Thanks