Click here for a story on the discovery.
And yes, Scots is a language of its own, or was historically. It and English descended from Anglo-Saxon and other roots, and Scots was not only the language of the common people, but of the government and literature up into the 18th century. Today there are still many speakers of Scots; the upcoming 2011 census in Scotland will for the first time include questions about Scots language use. You can learn more about Scots at the Scots Language Centre or the Scots Wikipedia. We do have books in and about Scots in the library collection, see our catalog. Project Muse and JSTOR would be good places to look for articles on the subject.