Magical objects in Harry Potter

‘Cloaking’ Device Uses Ordinary Lenses to Hide Objects Across Continuous Range of Angles
Mechanical invisibility cloak: Metamaterials protect objects on the lower side from touching. (Photo: T: Bückmann / KIT)
Elastic Invisibility Cloak Allows to Hide from Touching
Carnegie Mellon Method Uses Network of Cameras to Track People in Complex Indoor Settings
More Companies Bypassing Electric Grid Inefficiencies With Fuel Cells