Scientists have used a smartphone to control the activity of the living cells inside an animal. The fusion of biology and technology was used to control blood sugar levels in mice with diabetes. <br/><br/>The idea, described in Science Translational Medicine, could be applied to a wide range of diseases and drug treatments. Researchers at East China Normal University in Shanghai implanted the system into mice and were able to control diabetes with the tap of a touchscreen And the Chinese researchers say the approach could pave the way for a new era in medicine.