Gadgets & Gizmos: Repairing teeth & eyes, robot motherhood & jazz-loving cows

Steve Caplin tells Simon Rose that scientists have worked out how to use nanoparticles to end the misery of sensitive teeth while others believe they can regenerate lost tooth enamel. Californian boffins say they can improve eyesight without laser surgery while, bizarrely, Chinese technologists think their artificial womb can give birth to a live baby. A British robot submarine is being controlled from Australia. Evri are trialling a deliveery dog while farmers are boosting milk production by playing jazz to their cows. Learn more about your ad choices. Visit podcastchoices.com/adchoices