Great question — answering as the UphillTech team:
Dynamic content is everywhere on the net - you only have to look at online news sites. What you are describing is a display of archives (paginated). The way for this to work best for SEO purposes is to ensure that each "item" that you are referring to lives on it's own URL, and then that item is referenced (linked to via the headline and showing the content), either in whole, or as an excerpt, in the archives. That way, search engines and visitors alike can always access that particular piece of content at anytime (linked, bookmarked, etc), but you can still display your content in a fresh-to-old fashion. Your next consideration is whether you want the paginated pages themselves to be...
Full answer by Mike Hudson: https://webmasters.stackexchange.com/a/9094 (CC BY-SA 4.0).
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