Official Google Blog: “We’ve added contextually relevant, left-hand navigation to the page. This new side panel highlights the most relevant search tools and refinements for your query. Over the past three years, we’ve launched Universal Search, the Search Options panel and Google Squared, and it’s those three technologies that power the left-hand panel. Universal Search helps you find the most relevant types of results for your search. The top section of the new left-hand panel builds on Universal Search by suggesting the most relevant genres of results for your query and letting you seamlessly switch to these different types of results….Our expandable Search Options panel launched last spring brought many rich slice-and-dice tools to search. The new left-hand navigation showcases these tools and enables you to get a different view of your results. Perhaps you’d like to see images from each of the results or just the newest information? These options are all on the left, and our technology will suggest the tools that are most relevant and helpful to your query. Google Squared (available on Google Labs) helps you find and compare entities. Our “Something different” feature builds on the technology in Google Squared to find other entities that are related to your query, so you can easily explore not only the results for your current query but other related topics. In addition to the left-hand side changes, we’ve updated our look and feel in terms of our color palette and our logo. These changes are slight, keeping our page minimalist and whimsical, but make our overall look more modern.”