We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at ...

According to Einstein's theory of relativity and a new NIST study, time on Mars passes faster than on Earth. Discover the ...

For decades, physicists have struggled to reconcile the laws governing the very small with those that describe the vast cosmos. Quantum mechanics rules subatomic particles, while general relativity ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

Quantum mechanics is rich with paradoxes and contradictions. It describes a microscopic world in which particles exist in a ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of ...

Albert Einstein won the 1921 Nobel Prize in Physics, but not for relativity—the theory that made him famous. This article ...

General Relativity, Einstein’s revolutionary theory of gravity, reinterprets gravitational interactions as phenomena emerging from the curvature of spacetime rather than as forces in the traditional ...

A study by physicists affiliated with the Foundational Questions Institute (FQxI) found that time ...

General Relativity, Einstein’s seminal theory of gravitation, remains a pillar of modern physics by describing gravity as the curvature of spacetime. Nonetheless, persistent questions—ranging from the ...