Facebook announces Graph Search
Facebook revealed it is creating a new search engine during a "mystery event" at its California base.
Founder and chief executive Mark Zuckerberg lifted the lid on Graph Search at Facebook's Menlo Park HQ.
Speculation had been rife since tech journalists and bloggers were invited to the event with the mysterious prompt to "come and see what we're building".
Experts had suggested in the run up to Tuesday's presentation that Facebook was preparing to unveil its own smartphone or other gadget.
However, it was all about search on Tuesday, with Zuckerberg saying Graph Search would be "very, very different" to other search engines in popular use.
The social networking site's one billion members will be able to use Graph Search to track down content such as photos and people shared by their Facebook friends.
The 28-year-old tech legend insisted Graph Search was not a web search. But integration with Microsoft's Bing means searches not covered by Graph Search can be fulfilled.
Graph Search will be introduced "very slowly", according to Zuckerberg.
The pool of information shared between friends on Facebook is known as the social graph, with photos and status updates among the things falling under its umbrella.
Zuckerberg said: "We're not indexing the web. We're indexing our map of the graph - the graph is really big and it's constantly changing."
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