By observing tiny ripples in spacetime called "gravitational waves" that propagate away from colliding black holes, ...

Is there a universe where time flows backward or where our reality is flipped? The Mirror Universe Hypothesis explores this intriguing possibility, and we explain it all here.

One theory is that dark matter resides in a “dark mirror” universe that failed to form atoms during the nucleosynthesis of ...

Neil Turok, renowned cosmologist and Higgs Chair of Theoretical Physics at the University of Edinburgh, suggests a mirror universe existed before the Big Bang, moving backward in time. This bold ...