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  1. Mar 13, 2023 · What is a multiverse? The multiverse is a term that scientists use to describe the idea that beyond the observable universe, other universes may exist as well.

    • Eternal inflation, the Big Bang theory and parallel universes. Around 13.7 billion years ago, everything we know of was an infinitesimal singularity. Then, according to the Big Bang theory, it burst into action, inflating faster than the speed of light in all directions for a tiny fraction of a second.
    • Quantum mechanics and parallel universes. Some researchers base their ideas of parallel universes on quantum mechanics, the mathematical description of subatomic particles.
    • Infinite space, infinite universes? Some physicists believe in a flatter version of multiple universes. That is, if the universe that we live in goes on forever, there are only so many ways that the building blocks of matter can arrange themselves as they assemble across infinite space.
    • The mirror-image universe. In a relatively recent addition to the pantheon of multiverse theories, researchers from the Perimeter Institute for Theoretical Physics in Waterloo, Ontario, have proposed that the universe began at the Big Bang — and on the opposite side of the Big Bang timeline, stretching backwards in time, a universe once existed that was the exact mirror image of our own.
  2. Jun 20, 2022 · These waves might hint at alternate realities — ones with, say, dinosaurs or aliens — right there in your living room.

  3. A parallel universe, also known as an alternate universe, parallel world, parallel dimension, alternate reality, or alternative dimension, is a hypothetical self-contained layer or plane of existence, co-existing with one's own.

  4. Alternate reality (or Alternative reality, UK English) often refers to parallel universes in fiction, a self-contained separate world, universe or reality coexisting with the real world, which is used as a recurring plot point or setting used in fantasy and science fiction.

  5. en.wikipedia.org › wiki › MultiverseMultiverse - Wikipedia

    The different universes within the multiverse are called "parallel universes", "flat universes", "other universes", "alternate universes", "multiple universes", "plane universes", "parent and child universes", "many universes", or "many worlds".

  6. May 19, 2023 · Alternate Realities/Timelines: Alternate realities or timelines are variations of our own reality that diverge due to different events or choices taking place. These alternate realities exist within the same universe but branch off into different paths, resulting in different outcomes.