New measurements could upend the standard theory of the cosmos that has reigned since the discovery of dark energy 21 years ago.
Although Einstein’s theory of space-time seems more complicated than Newtonian physics, it greatly simplified the mathematical description of the universe.
Opinions differ about what recent measurements of a sound-trapping fluid reveal about light-trapping black holes.
A recent challenge to Stephen Hawking’s biggest idea — about how the universe might have come from nothing — has cosmologists choosing sides.
In a world seemingly filled with chaos, physicists have discovered new forms of synchronization and are learning how to predict and control them.