OSA

Researchers at the University of Utah have devised a method to create invisible images embedded within normal-looking images using cheap inkjet printers. The data hidden in these images can then only be revealed using sub-millimeter electromagnetic radiation

In what could lead to new ultrathin insulation, researchers at the University of Namur in Belgium and the University of Hassan I in Morocco found that radiation plays a larger role than conduction in the insulation of polar animals such as penguins and polar bears than previously believed.