In Jim Arnold's blog, we have been having an occasionally enlightening, occasionally exasperating discussion about whether gravitational waves (GWs) exist.

The evidence strongly supports the interpretation of the mathematics of general relativity that says gravitational waves do indeed exist and are, in principle if not yet in practice, observable.

That leads to a question that hasn't come up in Jim's blog but I'd like to raise here: What is the spectrum of gravitational radiation?

Engineering researchers have narrowed the search for the source of X-rays emitted by lightning, a feat that could one day help predict where lightning will strike.

Cymbals don’t clash of their own accord – in our world, anyway. But the quantum world is bizarrely different. Two metal plates, placed almost infinitesimally close together, spontaneously attract each other.

A newly developed nano-sized electronic device is an important step toward helping astronomers see invisible light dating from the creation of the universe.

Scientists at the University of Cambridge have for the first time identified a key component to unravelling the mystery of room temperature superconductivity, according to a paper published in today's edition of the scientific journal Nature.

Another blogger here, who is generally so far off the mark that I don't want to point to his earlier discussion, had some odd things to say about the "Pioneer anomaly," the unexplained deviation of the two Pioneer spacecraft from their predicted trajectory as they pass through the outer reaches of the solar system.

A much more cogent discussion has just appeared.

Baseball diamonds are a left-hander's best friend.

Researchers at North Carolina State University have found that quantum dot nanoparticles can penetrate the skin if there is an abrasion

The National Institute of Standards and Technology (NIST) has released a five-chapter preview of the much-anticipated online Digital Library of Mathematical Functions (DLMF).

The odd behavior of a molecule in an experimental silicon computer chip has led to a discovery that opens the door to quantum computing in semiconductors.