Time travel has long been a topic of science ... or CTCs—paths through space-time that loop back to the same ... A new quantum theory shows that time travel might work—if memory, ...

Some physicists think our reality is a kind of cosmic hologram, with space, time, and gravity as manifestations of a ...

Time travel has long been a staple of science fiction, captivating imaginations with the possibility of moving through time ...

One of the biggest questions in physics asks whether space-time is classical or quantum in nature. From slow neutrinos to quantum foam, these experiments are hoping to finally answer it ...

A novel theory of "wavy space-time" suggests the division between our best descriptions of the universe on its smallest and largest scales may be because gravity does not play by quantum rules.

The Block Universe is a delight to time-travel enthusiasts because it says that past ... String theory cannot yet derive the existence of space-time itself from the quantum comings-and-goings of ...

Space is big and time is relative, so a change to a quantum particle on Earth that’s entangled with a particle near a black hole 10 billion light-years away would mean changing the behavior of ...

A concept called “quantum entanglement” suggests the fabric of the universe is more interconnected than we think. And it also suggests we have the wrong idea about reality.

Time is a thorny problem for physicists; its inconsistent behavior between our best theories of the universe contributes to a deadlock preventing researchers from finding a "theory of everything ...

A new quantum theory shows that time travel might work—if memory, aging, and entropy reset inside a closed time loop. (CREDIT: CC BY-SA 4.0) ...

Time travel has long been a topic of science fiction, filled with thrilling possibilities and mind-bending problems. The most famous of these problems is the "grandfather paradox".