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Google Images Tests New Related Searches User Interface
The Google Operating System reports Google is testing a new Image Search interface for related searches.
The example given shows images for [nexus 7], At the top is a carousel of related searches to the [nexus 7]. When you click on one of those related images, Google will show you a larger thumbnail image of the images that match that related search within the black preview window.
Below are screen shots from Alex Chitu:
Then, click on a related search phrase: