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 ...

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 ...

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 ...

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 ...

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 ...