Researchers at Harvard Medical School have created an implantable hydrogel that can be used as a diabetes treatment. When shone with a light, genetically modified cells in the gel produced a compound that triggered insulin secretion. Although still in its very early stages, the scientists are working on a way to make the device smaller by using micro-LED technology and a wireless power receiver, according to a report from New Scientist. As of now, the device is bulky and needs to be connected to an external wire. More