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Google confirmed the program was one of 50 to 200 experiments the company regular runs on its Websites all over the world. Now Google, which threw its hat into the social media ring with Google Buzz, is toying with human curation on its normally algorithmically-generated Websites.

Participating publications are not paying to place their links, which rotate similar to the way stories rotate on Google News. Links users see one minute will be replaced by links from other publications the next.