I've been exploring the new Google News Archive Search.
News archive search provides an easy way to search and explore historical archives. Users can search for events, people, ideas and see how they have been described over time. In addition to searching for the most relevant articles for their query, users can get an historical overview of the results by browsing an automatically created timeline. Search results include both content that is accessible to all users and content that requires a fee. Articles related to a single story within a given time period are grouped together to allow users to see a broad perspective on the events.I did a couple of searches, and most of the info I was interested in (from 70 years ago) is locked - it needs a subscription to access it. However, I think this will change as newspapers begin to see the possibilities in monetizing their archives.