Wormhole
Wormhole. Conceptual image of the theoretical possibility of wormholes in space leading from one part of the Universe (left) to another (right). This hypothetical method of travel would shorten a journey that would take years even if travelling at or near the speed of light. The concept of curved spacetime, and using wormholes to travel to distant parts of the universe, follow from Einstein's General Theory of Relativity.
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