Scientific American is carrying this summary of the development of a paper towel which can detect hazardous chemicals simply by wiping it on a surface. Scientists used nanofibers to trap antibodies in the material, which react with biohazards by changing color.

The system is still in the early stages of development, but if brought to market promises to create a whole new class of hypocondriac phobias. Just think, now you can know just how nasty that toilet seat is!