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

For more than a century, gravity has been the immovable backdrop of modern physics, a force that can be described and ...

For more than a century, gravity has been the stubborn outlier in physics, resisting every attempt to merge Einstein’s smooth space-time with the jittery world of quantum mechanics. A new wave of ...

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

What Does Gravity Look Like? Einstein’s theory of relativity described gravity as the distortion of space and time—which bend and stretch based on the masses of objects within them as well as the ...

An international research team led by Chinese scientists has for the first time presented experimental evidence of a graviton-like particle called chiral graviton modes (CGMs), with the findings ...

This episode of the Physics World Weekly podcast features Alex May, whose research explores the intersection of quantum ...

A longstanding goal in physics has been to link general relativity with quantum theory and so unify the forces of nature. Theories of quantum gravity, however, are plagued by the weak theoretical ...