Einstein's theory of relativity envisions time as a spatial dimension, like height, width, and depth. But unlike those other dimensions, time seems to permit motion in only one direction: forward.

An international team of scientists has developed an algorithm that can put data with large time uncertainty into chronological order. After applying statistical techniques to data obtained with a 300 ...

Quantum computers—devices that process information using quantum mechanical effects—have long been expected to outperform ...