A breakthrough in graphene imaging technology means you might soon have a smart contact lens, or other ultra-thin device, with a built-in camera that also gives you infrared "heat vision." By sandwiching two layers of graphene together, engineers at the University of Michigan have created an ultra-broadband graphene imaging sensor that is ultra-broadband (it can capture everything from visible light all the way up to mid-infrared) -- but more importantly, unlike other devices that can see far into the infrared spectrum, it operates well at room temperature.