An implant which secretes insulin could one day replace the constant need for injections for people with diabetes. An international team of scientists says the device, created using human stem cells, could help countless patients keep their blood sugar levels in check. People with type 1 diabetes do not produce enough insulin, a hormone which helps the body convert sugar (or glucose) into energy. They therefore have to take insulin injections on a regular basis – often between two and four times a day, to regulate their blood sugar levels. Now, scientists have developed cells that produce insulin for more...