Expand & Collapse Google Result

Google seems to be experimenting with yet another variation of its SERPs... expand & collapse results. Dave Winer, who discovered this while searching for Canada, says: “In the left margin there are blue wedges. Click on a wedge and it expands, to reveal details, click again, it collapses. Outlining shows up, in a simple manner, in a Google display.”
[Source: blog.outer-court]