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  2. 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.

  3. Nov 3, 2021 · But if the universe began at a finite point, as nearly every physicist agrees that it did, an alternate version of you likely doesn't exist, according to astrophysicist Ethan Siegel's 2015 Medium...

  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. Jun 20, 2022 · These waves might hint at alternate realities — ones with, say, dinosaurs or aliens — right there in your living room.

  6. Mar 13, 2023 · Learn about the different scientific theories that suggest the existence of a multiverse, or multiple universes beyond the observable one. Explore the concepts of cosmic inflation, quantum mechanics and parallel timelines, and why they are so hard to prove.

  7. Nov 2, 2023 · In this comprehensive guide, I‘ll unpack the differences between alternate and alternative realities, pop culture examples, why we find them so intriguing, and tips for crafting compelling alternate timelines in fiction stories. Let‘s dive in!

  8. Mar 12, 2019 · A team of physicists has performed the first experiment that demonstrates the Wigner's Friend paradox, which shows how quantum mechanics allows two observers to experience conflicting realities. The experiment challenges the notion of objective reality and raises questions about the assumptions of science.