A wormhole is a hypothetical structure connecting disparate points in spacetime, and is based on a special solution of the Einstein field equations.[1]
A wormhole can be visualized as a tunnel with two ends at separate points in spacetime (i.e., different locations, different points in time, or both).
Wormholes are consistent with the general theory of relativity, but whether wormholes actually exist remains to be seen. Many scientists postulate that wormholes are merely projections of a fourth spatial dimension, analogous to how a two-dimensional (2D) being could experience only part of a three-dimensional (3D) object.[2] A well-known analogy of such constructs is provided by the Klein bottle, displaying a hole when rendered in three dimensions but not in four or higher dimensions.
Theoretically, a wormhole might connect extremely long distances such as a billion light-years, or short distances such as a few meters, or different points in time, or even different universes.[3]
In 1995, Matt Visser suggested there may be many wormholes in the universe if cosmic strings with negative mass were generated in the early universe.[4][5] Some physicists, such as Kip Thorne, have suggested how to make wormholes artificially.[6]
^Overbye, Dennis (10 October 2022). "Black Holes May Hide a Mind-Bending Secret About Our Universe – Take gravity, add quantum mechanics, stir. What do you get? Just maybe, a holographic cosmos". The New York Times. Retrieved 10 October 2022.
^Choi, Charles Q. (2013-12-03). "Spooky physics phenomenon may link universe's wormholes". NBC News. Retrieved 2019-07-30.
^"Focus: Wormhole Construction: Proceed with Caution". Physical Review Focus. Vol. 2. American Physical Society. 1998-08-03. p. 7.
^"Searching for a 'Subway to the Stars'" (Press release). Archived from the original on 2012-04-15.
^Thorne, Kip S. (1994). Black holes and time warps : Einstein's outrageous legacy. New York. p. 493. ISBN 978-0393312768.{{cite book}}: CS1 maint: location missing publisher (link)
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