RICHARD KAIL / SCIENCE PHOTO LIBRARY RICHARD KAIL / SCIENCE PHOTO LIBRARY
Wormhole travel. Image showing the theoretical possibility of a spacecraft using a wormhole in space leading from one part of the Universe (upper right) to another (lower 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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