Google is contstantly testing what their search interfaces show and how they show it.
Lately they’ve been experimenting with card-style search results, and wider google search results. Barry Schwartz added some screen shots of the newest Google search tests:
Google is constantly playing around and testing user interfaces for their search results and other services. Just recently, we captured them testing black instead of blue links in the main search results. Now, we are seeing Google testing two different interfaces, one that has a much more spacious and wider search results page layout, and the other that brings back the card-based styled interface from 2013.
You can read the full article HERE