A parallel universe, also known as an alternate universe, world, or dimension, is a plot device in fiction which uses the notion of a hypothetical universe co-existing with another, typically to …

Nov 3, 2021 · Science fiction loves the idea of a parallel universe, and the thought that we might be living just one of an infinite number of possible lives. Multiverses aren't reserved for "Star …

Dec 19, 2025 · But the ‘parallel universe’ concept at the core of the show — which is set to conclude its nearly decade-long run at the end of this year — comes from a real scientific theory.

May 4, 2022 · Even though certain features of the universe seem to require the existence of a multiverse, nothing has been directly observed that suggests it actually exists.

Feb 7, 2025 · Discover if other dimensions are real—explore theories from physics, real experiments, and what science says about parallel universes.

Aug 21, 2025 · To ask about the multiverse is to ask about the limits of reality itself. Though modern cosmology grounds the multiverse in mathematics and physics, the roots of the …

Jul 19, 2025 · The concept of an “Alternate World” – often called an alternate reality, parallel universe, or even branching timeline – is a powerful and enduring one in human imagination.

In a parallel universe, the characters in one universe appear in a second universe and face the same situations. However, they may not make the same decisions, leading to a different …

The multiverse is the hypothetical set of all universes. [1][a] Together, these universes are presumed to comprise everything that exists: the entirety of space, time, matter, energy, …

Sep 6, 2023 · Within a parallel universe, also known as an alternate universe, our wars have had different outcomes than the ones we know. Extinct species in our universe have evolved and …