Ether (or aether) is a term used in ancient mythology and medieval science to denote the matter that fills in the void of the universe. In the 19th century, physicists borrowed the concept to depict a ...

Received wisdom holds that the notion of an 'aether' — a medium pervading all space, and the material 'substance' of the vacuum, if you will — was permanently relegated to the history books by ...

As the 19th century came to a close, physicists were feeling pretty satisfied with the state of their science. The great edifice of physical theory seemed complete. A few minor experiments remained to ...

All throughout the Universe, different types of signals propagate. Some of them, like sound waves, require a medium to travel through. Others, like light or gravitational waves, are perfectly content ...

GILBERTS, Ill., June 7 (UPI) -- U.S. physicists say they have developed a theory that mathematically predicts and explains the measured values of physics with great precision. David Thomson and Jim ...