Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

Hunting spacetime fluctuations could unite Einstein and quantum physics By Michael Irving December 05, 2023 An artistic impression of an experiment investigating whether spacetime follows classical or ...

Contemporary physics has learned to describe the universe with unprecedented precision. Yet when it tries to say what time is, it stumbles again and ...

The Einsteinian Revolution: The Historical Roots of His Breakthroughs Jürgen Renn and Hanoch Gutfreund Princeton Univ. Press (2023) German physicist Albert Einstein died in 1955, and yet he is much ...

We've all heard of relativity, but what is it? How does it relate to light and motion? So we've all heard of relativity, right? But... what is relativity? And how does it relate to light? And motion?

A pair of scientists from the UK recently published a pre-print research paper discussing the theory of a universe with no beginning. Imagine it: our universe has always existed. The Big Bang either ...

Strangely, although we feel as if we sweep through time on the knife-edge between the fixed past and the open future, that edge—the present—appears nowhere in the existing laws of physics. In Albert ...

Classical Mechanics:** Newton’s second law (F = ma) explains the relationship between force, mass, and acceleration. The law ...

Their work introduces a new concept called q-desics, short for quantum-corrected paths through space–time. These paths ...