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It seems Google is showing image thumbnails on some of the "people also search for" related queries breakout search feature. I can replicate it for music related queries, such as [old man neil young] where at the bottom, instead of just showing text links to expand your query, you are also given image thumbnails.
Here is a picture:
Ceatus SEO notified me of this and posted it on Twitter. He said "Example of ongoing small changes to Google's results: Images appear with "People also search for" for music searches."
Google's search results keep getting richer and richer.
Forum discussion at Twitter.
