Does the universe have an edge? Is time travel possible? What is a black hole, and in what sense are space and time described by "geometry"? The modern theory of spacetime introduced by Einstein ...

Does the universe have an edge? Is time travel possible? What is a black hole, and in what sense are space, time and gravity a matter of "geometry"? The modern theory of spacetime introduced by ...

Time travel is deterministic and locally free, a paper says —resolving an age-old paradox. This follows research observing ...

Ever since Einstein revealed his special theory of relativity, we've known that time travel—at least moving forward through time—is possible. Einstein didn't pull this theory, or even the ...

Einstein's idea about time slowing down sounds fine in theory, but how can you be sure he's right? One way would be to hop in a rocket and travel near the speed of light. Yet everything we know ...

Time travel is mathematically feasible, says a new study on closed time-like curves (CTCs). Scientists show paradox-proof ...

Albert Einstein wrote the travel diaries on a trip to Asia and the ... A life spent re-imagining physics This is the first time the diaries have been published as a standalone volume in English.

Researchers explore how time loops, known as closed timelike curves, could make time travel possible while avoiding paradoxes.

We spoke with theoretical physicist Brian Greene about Einstein's theory of space-time. Many scientists believe space-time is a fundamental concept. But Greene thinks there might be something ...