To prevent the thin green line from getting thinner still, the Administration may well have to put major Reserve ground components on active-duty status for the first time since the Berlin crisis ...

Physicists have developed a lens with 'magic' properties. Ultra-thin, it can transform infrared light into visible light by halving the wavelength of incident light.

Charles met a number of officers during his visit to Northern Ireland on Wednesday.

Once the material is heated to 600°C, it takes on crystalline properties that enable the conversion of light as in the case of the green laser pen. ... Ultra-thin lenses that generate new light.