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Doctors at Moorfields Eye Hospital in London have used microchips to help blind patients regain the ability to read. Also: the woman who played the clarinet during brain surgery, helping the doctors fine tune their treatment for Parkinson's; Thailand's water buffalo beauty contest; and how polystyrene boxes that keep fish fresh are being replaced... using mushrooms. Happy stories and positive news from around the world - our weekly collection. Presenter: Jannat Jalil. Music composed by Iona Hampson.