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Trials in Iran suggest a simple insecticidal collar for dogs helps prevent the spread of the parasitic disease leishmaniasis. HyShot, a supersonic scramjet, is built to fly at seven times the speed of sound is tested in the Australian desert. How women and girls with cancer may one day be given back their chance to have children. The "intelligent hoe", an unmanned computerised weeding machine. The "charm badge" that can detect your perfect business or romantic partner.