A beam of light can cross the entire universe in no time at all
A photon can cross a billion light-years while accumulating no elapsed time along its path. Special relativity links…
Quantum Gravity May Be Far Less Quantum Than Physicists Expected
Physicists have long assumed that uniting quantum mechanics with gravity would require spacetime itself to behave quantum mechanically.…
Scientists Develop a New Way To Measure Gravitational Waves in the Expanding Universe
Gravitational waves are typically studied as faint disturbances moving through otherwise quiet spacetime, but the situation becomes far…
Physicists believe that warp drive could exist in the next 100 years
Warp drive has long lived in science fiction, but physicists now treat it as a real, if deeply…
Einstein-Rosen Bridges May Not Be Wormholes After All, Physicists Reveal
The concept of the Einstein-Rosen bridge is often understood as a cosmic shortcut, akin to a tunnel that…
Black hole GW190521 may be a wormhole from another universe
For just one-tenth of a second in May 2019, the universe delivered a signal that did not fit…
Quantum Physics’ Strangest Problem May Hold the Key to Time Itself
Quantum collapse models hint at tiny time fluctuations. Credit: FQxI/Gabriel Fitzpatrick (2026) An FQxI cofunded study suggests hidden…
Light can travel for billions of years yet experience no time
A photon emitted from a star a billion light-years away arrives at a telescope having experienced no time…
Newly discovered ripples in spacetime put Einstein’s general relativity to the test
When black holes collide, the crash generates ripples in the fabric of spacetime—gravitational waves. These distortions travel far…
A New Theory Says Gravity May Come From Entropy—Which Could Lead to a Unified Theory of Physics
Here’s what you’ll learn when you read this story: A new theory suggests that gravity could possibly be…