Settling a half century of debate, researchers have discovered that tiny linear defects can propagate through a material faster than sound waves do. These linear defects, or dislocations, are what ...

Owners of the Mac PowerBook G4 are experiencing an audio defect in their high-resolution, 15- and 17-inch models. The problem, described as a looping echo sound that magnifies itself for about four to ...

Illustration of an intense laser pulse hitting a diamond crystal from top right, driving elastic and plastic waves (curved lines) through the material. The laser pulse creates linear defects, known as ...