SAN FRANCISCO -- The large and bright 'X' logo that sat on top of the San Francisco headquarters of the company formerly known as Twitter has been taken down. And now, the company will be fined for ...

As daylight diminishes people can feel their mood dimming. Experts say starting light therapy in the fall can help fend off winter depression. As the days get shorter, many people may also find their ...

A million suns isn't cool. You know what's cool? A billion suns. Physicists from the University of Nebraska's aptly-named Extreme Light Laboratory have just made the brightest light ever produced on ...

FEW PEOPLE enjoy the gloom that comes with winter in the world’s higher latitudes. In up to a tenth of the population, the long nights can trigger a type of depression known as seasonal affective ...

Their study appears in the journal Nature Photonics. How triplet-fusion upconversion works The research builds on a technique called triplet-fusion upconversion, which uses a combination of molecules ...