GENEVA, Switzerland — For over two decades, astronomers have been puzzled by the mysterious “dark energy” driving the ever ..

Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

File photo of Einstein's equation: energy equals mass times the speed of light squared A letter written by Albert Einstein containing his E=mc² equation has sold at auction in the US for more ...

Gravitational distortions produced by distant galaxies show a slight—but notable—disagreement with Einstein's predictions.

Scientists test the famous physicist’s predictions by calculating the distortion of time and space. Why is the expansion of ...

Einstein’s special theory of relativity, published a hundred years ago, also revealed that energy and mass are two sides of the same coin, forever linked in his famed equation E = mc2.

For our first, we’ll take perhaps the most famous equation of all. Albert Einstein’s 1905 equation relating mass and energy is both elegant and superficially counterintuitive. It says that energy is ...

The study says that the gravitational distortions observed in distant galaxies exhibit subtle discrepancies with the ...

Why is the expansion of our universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the ...

If you could convert the mass of a paper clip entirely to energy, how big a punch would it pack? Einstein's most famous equation, E = mc 2, indicates the calculation is straightforward ...

‘‘Until now, Dark Energy Survey data have been used to ... allowing us to look further back in time and ultimately test Einstein’s equations. Disclaimer: AAAS and EurekAlert!