Facebook chief executive Mark Zuckerberg introduced the new "Graph Search" feature at a press event in California.
He said: "Every piece of content has its own audience; most content is not public; you can only search for content that has been shared with you".
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Matt Hancock believes the devices can have a “real impact” on pupils’ achievements.
Court of Appeal judges in London will review his 30-year jail term for sex offences against boys he coached between 1979 and 1991.
Brexit and security, cannabis law and children’s mobiles dominate the papers on Wednesday.