Light is usually described using quantum mechanics when phenomena like entanglement enter the picture. But a new paper shows ...

Almost exactly 200 years ago, French physicist Sadi Carnot determined the maximum efficiency of heat engines. The Carnot ...

Classical music has been scientifically shown to help reduce stress. Unwind with some of the best pieces of relaxing classical music. Listening to classical music has been shown to lower blood ...

Ancient Iran, historically known as Persia, was the dominant nation of western Asia for over twelve centuries, with three successive native dynasties—the Achaemenid, the Parthian, and the ...