A new recipe of "quadratic gravity" could help to better define the picture of the Big Bang and the singularity that existed ...

In Albert Einstein’s Special Theory of Relativity, the concept of “time dilation” illustrates that the flow of time is ...

Non-relativistic string theory offers an innovative perspective on the formulation of quantum gravity, providing a tractable limit of fully relativistic string theories by expanding in inverse powers ...

Plasma, the fourth state of matter, consists of a gas in which electrons are no longer bound to atoms, which allows ...

On Aug. 21, the continental U.S. will be treated to a total solar eclipse that will dazzle the nation as it progresses from coast to coast, starting in Oregon and ending in South Carolina. The event ...

"God does not play dice." This famous remark by Albert Einstein critiqued the probabilistic nature of quantum mechanics. Paradoxically, his theory of relativity has become an essential tool for ...

First of all, the prevailing quantum theory, quantum field theory, is fully relativistic from the onset. Relativity is “built into” the theory, so to speak. And it’s the only quantum theory that is ...

A new theory for the origins of dark matter suggests that fast-moving, neutrino-like dark particles could have decoupled from Standard Model particles far earlier than previous theories had suggested.

For the past two decades, astronomers have been testing Einstein’s general theory of relativity using an exquisite celestial laboratory located thousands of light-years away, in the direction of the ...