parallel universe

A pair of physicists have come up with a solution to the time travel paradox that requires a very large — but not infinite — number of parallel histories.

Alternate Timelines

Would you step through a wormhole to a different timeline to kill Hitler?

Paradox-Free Time Travel Possible With Many Parallel Universes

In an interview with NBC, theoretical phycisist Sean Carroll argues that there "are multiple worlds where you made different decisions."

Multidimensional Cats

"It's absolutely possible that there are multiple worlds where you made different decisions."

This Physicist Believes There Are Countless Parallel Universes

This may be proof that a parallel universe is interacting with our own.

We May Have Uncovered the First Ever Evidence of the Multiverse

All about parallel universes, and how to reach one. 

Worlds Without End: The Many Kinds of Parallel Universes

Intellectual face-off: which side are you on?

Physicists Weigh In: Could We Ever Travel to a Parallel Universe?