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 ...

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

A new physics paper takes a step toward creating a long-sought "theory of everything" by uniting gravity with the quantum ...

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

“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 ...

A bold new quantum theory of gravity may finally bridge the long-standing rift between Einstein’s general relativity and quantum field theory. This potential "Theory of Everything" could answer some o ...

Albert Einstein is arguably the most influential scientist of the 20th century. His general theory of relativity changed our understanding of space and time, becoming one of the two pillars of ...

In a bold step toward solving one of science’s most puzzling problems, researchers have proposed a new way to bring gravity ...

Physicists have demonstrated the Terrell-Penrose effect, which causes an object moving close to the speed of light to warp ...

This is the central consequence of Albert Einstein's special theory of relativity ... Even the fastest Formula One car will only move a tiny fraction of the distance in the time difference ...