According to Google Operating System, Google is testing larger thumbnails for news results. This may not seem like a big deal, but it kinda is. Because it’s not just the photo that’s changing, it’s where the title lands that is important. Have a look.
This is what you see if you search for a news story using the “Web” tab.
There’s one small photo in line with the top story, followed by additional links. Above the is a general topic link that sends you to the “News” tab.