There are many types of spacetime within physics, the same way there are infinite dimensions in math. Some spacetimes are ...

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

The puzzle Einstein and Rosen were addressing was never about space travel, but about how quantum fields behave in curved spacetime. I ...

Wormholes are often imagined as tunnels through space or time — shortcuts across the universe. But this image rests on a misunderstanding of work by physicists Albert Einstein and Nathan Rosen. In ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be straightforward. Objects are still emitting light, and that light takes time to travel ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...