We all know we live in three-dimensional space. But what does it mean when people talk about four dimensions? Is it just a ...

Quasicrystals are orderly structures that never repeat. Scientists just showed they can exist in space and time.

An astrophysicist explains what wormholes are and how these theoretical space-time tunnels have popped up in the solutions to a set of decadesold equations.

Einstein–Rosen bridges may reflect a two-directional structure of time that preserves information and hints at a pre–Big Bang universe.

Loved Interstellar? Discover 5 must-watch sci-fi movies featuring space exploration, mind-bending time travel and emotional ...

Physicists artificially slowed down time to reveal the bizarre Terrell-Penrose effect, a consequence of special relativity. This image from the experiment shows a sphere seemingly moving at 99.9 ...

See how Relativity's Terran 1 rocket got from the 3D printer to the launch pad in these highlights. Credit: Relativity Space ...

Scientists scanning the heart of the Milky Way have spotted a tantalizing signal: a possible ultra-fast pulsar spinning every 8.19 milliseconds near Sagittarius A*, the supermassive black hole at our ...

Star Trek has used time travel plenty of times across the various shows in the franchise, and we think these are the best ...

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Theoretical research led by Professor Enrique Gaztañaga of the University of Portsmouth challenges the ...

The big bang wasn’t the start of everything, but it has been impossible to see what came before. Now a new kind of cosmology is lifting the veil on the beginning of time ...