Gravity used to be the most dependable rule in the cosmic rulebook, the quiet background force that never changed its mind.

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 ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at once, described by a mathematical object called a wavefunction.

For the second time in as many months, images gathered by the Hubble Space Telescope (HST) are raising questions about the structures of time and gravity, and the fabric of space. Using two HST images ...

Q: I am a 78-year-old man who’s about an inch and a half shorter than he used to be at one time. Why am I shrinking? A: We’re all getting shorter with age. Blame gravity. There are 23 discs between ...