It's very tough to find light beyond certain frequencies. If you want to see elusive terahertz waves, for example, you have to get a system that's either really slow or needs to be kept at a temperature near absolute zero -- not exactly practical. The University of Maryland's scientists have a better way, however. They've developed a graphene-based detector that not only works at room temperature, but should be over a million times faster than previous tech. The very nature of graphene is what makes it work so well; since the material doesn't absorb the heat from incoming light, you can use it as a sensor without having to keep it chilly or otherwise jump through hoops to get an accurate reading.