In our inked up future, vibrating tattoos will buzz when your phone rings, and change color when your blood sugar is low. But a new kind of sensor made of graphene could one-up them all–tattooed to your teeth, these sensors will be able to tell when you’re ill, and even possibly what’s ailing you–all from the bacteria on your breath. A bonus: It won’t even hurt to put them on.
via Co.Exist
