Scientists at the University of Cambridge and the University of Edinburgh have produced genetically modified chickens that may help prevent the spread of bird flu.
In the height of Australian cyclone season – which runs from November to April – a cyclone ranking at the most dangerous level has reached Queensland, Australia.
Twelve people in the US are to get pioneering stem cell treatment to try to cure their hereditary blindness, using the world's first eye therapy derived from human embryonic cells.