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

Do you know what connects Edwin Hubble’s theory for an expanding universe and Albert Einstein’s cosmological constant? The ...

China has quietly solved a problem that only becomes obvious once you try to live and work off-world: clocks on the moon do ...

Modern physics has a problem. Its two main pillars are quantum theory and Einstein’s theory of general relativity, yet these ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

Albert Einstein was intrigued by a simple puzzle: an old car must travel 2 miles at an average of 30 mph. The twist? Its structure makes the solution impossible. Can you solve it?

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

Relativity Space has completed a critical design review of its Terran R rocket as it works towards a first launch as soon as late 2026. Credit: Relativity Space WASHINGTON — Relativity Space, a launch ...