Researchers John Howell and Benjamin Howell at the University of Rochester have demonstrated a new type of "invisibility cloak" that can be used to hide objects of almost any size from human beings to orbiting satellites.
An array of invisibility cloaks have been created in order to slow down and even stop light. This technique, known as "trapping a rainbow" can be used in a variety of fields from medicine to camouflage.
Researchers at the University of Texas have designed a coating that makes 3-D objects invisible on microwave scanners. The scientists say the technique can also hide objects in the visible spectrum but now they can only do it for very small objects.