[Air-L] Twitter Timeline Limits

Hi all, I'm working on a project with some colleagues regarding Twitter use and hashtags, and we are looking for a key piece of information: how long tweets are publicly viewable. Twitter's site used to say they were available "approximately 10 days." But now, there's no reference to this limit at all. The closest information I can find is that they now allow users to view 3200 of their most recent tweets. Does anyone know if Twitter has changed this limitation? Or where I might find more up-to-date information on this issue? We would deeply appreciate any help. Thanks, Dave Jones PhD Candidate Professional Writing and New Media Old Dominion University Chair, SIGDOC ODU djone111@odu.edu