After testing a persistent header, Google continues to experiment with infinite scrolling for Google search results. A Webmaster World user spotted a new box that replaces the standard pagination links: “show more results”. When you click the message, Google loads the second page of results below the top results.
Barry Schwartz says that Google tested a similar interface back in June. I remember that SearchMash, Google’s old playground for search experiments, used infinite scrolling in the first iterations. Last year, Google Image Search added infinite scrolling,