Wormholes could allow time travel from "summary" of A Brief History of Time by Stephen W. Hawking
In the realm of theoretical physics, the notion of wormholes has long captured the imagination of scientists and science fiction enthusiasts alike. These hypothetical passages through spacetime have been proposed as potential shortcuts that could connect distant points in the universe. While the existence of wormholes remains purely speculative, their theoretical properties suggest intriguing possibilities, including the potential for time travel. According to the theory of general relativity, as elucidated by Einstein, spacetime is a four-dimensional continuum that can be warped and distorted by the presence of massive objects. Wormholes are envisioned as tunnels that create a shortcut through this fabric of spacetime, allowing for rapid travel between two separate locations. In essence, a wormhole could serve as a cosmic bridge that links two distant regions of the universe, bypassing the conventional constraints of three-dimensional space. One of the most fascinating implications of wormholes is their potential to enable time travel. The curvature of spacetime within a wormhole could create a pathway not only through space but also through time. By traversing a wormhole, an individual could theoretically emerge at a point in spacet...
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