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 ...

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 ...

Classical physics theories suggest that when two or more electromagnetic waves interfere destructively (i.e., with their electric fields canceling each other out), they cannot interact with matter. In ...