Light-bending gel makes holograms much cheaper

Inexpensive nanoparticles in a gel can replace traditional materials used to create holograms at a much lower cost, researchers report. Holograms can be created by using magnetic fields to alter the path of light, but the materials that can do...
Read more »

There may be at least 5 kinds of depression and anxiety

Researchers have identified five new categories of mental illness that cut across current diagnoses of anxiety and depression. The five categories, which researchers define by their specific symptoms and areas of brain activation, are: tension, anxious arousal, general anxiety, anhedonia...
Read more »