Quantum theory has long treated time as a silent backdrop, a parameter that never jitters even as particles flicker in and out of superposition. A new line of work now argues that this picture is ...

For many years, the simplest view of dark energy has been that it remains unchanged. Throughout cosmic history, the mysterious ingredient believed to drive the universe's accelerated expansion is ...

Why do clocks run at different speeds on the ground and in space? Why do distant galaxies sometimes appear as beautiful rings ...

Most lovers of science fiction are quick to tell you that there's a "time-honored" (pun intended) way to build a time machine - somehow get a wormhole and use it as a bridge to travel through time.

Einstein’s theory of general relativity, where gravity is caused by the curvature of space-time, is awesome. It has been confirmed to an incredible level of precision, extending to fifteen significant ...

A NEW computer is always welcome, isn’t it? It’s always faster than your old one, and it always does more stuff. An upgrade, the latest model with all the bells and whistles is an exciting prospect.

The theories of quantum mechanics and gravity are notorious for being incompatible, despite the efforts of scores of physicists over the past fifty years. However, recently an international team of ...