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

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.

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

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 ...

Over four months, March through June 1905, Albert ... Einstein experienced what he would later call “the most fortunate thought of my life.” He knew that his 1905 special relativity theory ...

When it comes to space travel, Albert Einstein's theory of relativity is a major inconvenience. With the laws of physics (currently) prohibiting faster-than-light travel, velocities are limited to ...

This effect, predicted by Einstein’s theory of general relativity, helps astronomers study galaxies from the... A new study has put forward a black hole model that eliminates the central ...

Since the early days of general relativity, leading physicists, like Albert Einstein and Erwin Schrödinger, have tried to unify the theory of gravitation and electromagnetism. Many attempts were ...