Discover how Einstein’s theory of special relativity reshaped physics by linking space, time, mass, and energy in a universe governed by the speed of light. Albert Einstein's 1905 theory of ...

When an object moves extremely fast—close to the speed of light—certain basic assumptions that we take for granted no longer ...

Albert Einstein had described the special theory of relativity in 1905. The result of Einstein's thinking about light, this theory introduced brand-new ideas to science. It opened up an entire ...

A Growing Mystery The discovery of the Universe’s accelerating expansion in 1998 left scientists scratching their heads, ...

A bold new quantum theory of gravity may finally bridge the long-standing rift between Einstein’s general relativity and ...

“The chief attraction of the theory lies in its logical completeness,” wrote Albert Einstein after publishing his general theory of relativity in 1915. “If a single one of the conclusions ...

On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics.

By modifying Einstein's theory of general relativity, the center of a black hole with infinite curvature could be replaced by a highly curved but regular region of space-time, the researchers ...

Einstein’s strangest optical illusion has been captured—thanks to lasers, a cube, and a bit of artistic inspiration.

but acting more like Albert Einstein predicted in his 1915 general theory of relativity. "Dark energy seems to be dynamical and weakening," said astrophysicist Mustapha Ishak-Boushaki of the ...

Albert Einstein’s theory of special relativity describes how moving at close to the speed of light would affect travellers’ experience of space and time. These insights don’t merely give us ...

They found that the Lorentz contraction—a key part of Einstein’s theory of special relativity—doesn’t actually change how a fast object looks in a photograph. Instead, the object seems ...