Imagine having a tiny computer chip implanted in our bodies which could monitor our health constantly.
This sci-fi fantasy may soon become a reality with the development of biofuel cells. Chemists have developed a miniature batterythat could run on bodily fluids and drive sensors to monitor our health. Quentin Cooper speaks to the researchers working on these devices.
Producer Pam Rutherford EMAIL: material.world@bbc.co.uk