Quantum mechanics has always had a way of making even the sharpest minds stop and scratch their heads. In the everyday world, ...

Many scientists hold the belief that the paradoxes associated with time travel, which have perplexed thinkers for centuries, ...

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has ...

According to Einstein’s theory of gravity, black holes have only a small handful of distinguishing characteristics. Quantum ...

Quantum mechanics and classical physics don’t always get along, and can sometimes form apparent paradoxes where observed quantum behavior violates well-established physical laws.

The third Quantum Gravity conference took place at Penn State University from 21 to 25 July 2025, bringing together ...

A new theory suggests that “time” might be the product of a universe that, long ago, decided to settle down into one definitive story, sparking reality as we know it.

A classic quantum experiment done near a black hole would create a paradox, physicists report. But not if the black hole collapses quantum states.

In the entanglement case, quantum theory accounts for the observed correlation of the photon polarizations. But even when a theory predicts experimental results, a paradox may remain if the ...

When a German physicist returned from a health retreat 100 years ago, his ideas sparked a debate about reality, and gave rise ...

Quantum mechanics and classical physics don’t always get along, and can sometimes form apparent paradoxes where observed quantum behavior violates well-established physical laws. In quantum ...