Paint scratches are a practically inevitable part of vehicle ownership, even on relatively low-mileage cars. Roads are hardly sterile environments, and driving on them will find you picking up gravel, ...

Fasteners also prevent gases and liquids from leaking. Fasteners also prevent gases and liquids from leaking. When large areas or mating surfaces must be sealed, a gasket or caulking compound is used.

Researchers have shown how liquid crystals can be employed to create compound lenses similar to those found in nature. Taking advantage of the geometry in which these liquid crystals like to arrange ...