Tattoos May Help People with Diabetes

A new  type of sensor that changes color with rising blood sugar levels is now being testing by scientists. About the size of the clicker on the end of a ballpoint pen, this high tech tattoo is made up of tiny nanospheres which contain a special kind of ink that reacts with glucose. Invented by Heather Clark, a biomedical engineer at Draper Laboratory in Cambridge, Massachusetts, the tattoo hasn’t yet been tested in humans but the early results in mice have been very promising.