On May 29, 1919, a total solar eclipse helped to prove Albert Einstein's theory of general relativity. [‘On This Day in Space ...

The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts under ...

A new study just added an interesting twist to the complicated history of the physics theory.

A rare manuscript featuring early calculations that led to Albert Einstein's general theory of relativity sold for just over $13 million at an auction in Paris Tuesday, becoming the most expensive ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

THE appearance of a connected account of the Principle of Relativity in our own language will be welcomed by many as an opportunity of acquainting themselves in more detail with the ins and outs of a ...

BOULDER- Black holes, time travel and E= mc^2. They are all related to Albert Einstein's Theory of Relativity. How many of us, though, can actually explain any of it? This year, Einstein's theory ...

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 ...

Tenets of quantum mechanics and special relativity, among other theoretical ideas, lead inexorably to string theory.