In the Harry Potter stories, an invisibility cloak can hide a person even while they walk, bend, or run. In the real world, ...

Chinese researchers have moved a long-running science fiction fantasy into the realm of working hardware, unveiling a prototype cloak that can make a person effectively vanish from view. Instead of ...

There’s a well-known story in Plato’s Republic in which a humble shepherd named Gyges finds a magical gold ring that renders whoever wears it invisible. Gyges proceeds to use his newfound power to ...

The great unappreciated weakness of invisibility cloaks is that they only make things invisible to human eyes. Or x-ray imagers. Or ultraviolet sensors, infrared image analyzers, echo-location audio ...