It would be decades before the advent of $2,700 at-home lasers and multipronged microcurrent devices that promised to ...

Explore the world’s strongest handheld laser, a 250-watt marvel that melts metal, ignites wood, and redefines portable ...

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.