Wormholes
Wormholes are hypothetical passages through space-time that could create shortcuts between distant points in the universe. Imagine space-time as a sheet of paper; if you fold it in half and poke a hole through both layers, you connect two distant spots. While they arise from the equations of general relativity, no experimental evidence proves their existence. If they do exist, they might allow for faster-than-light travel or even time travel, but the actual physics, potential stability, and implications for travel remain largely speculative and theoretical.
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Wormholes are theoretical passages through space-time that could create shortcuts between distant points in the universe. Imagine folding a piece of paper so two distant dots touch; a wormhole connects those dots. Proposed by Einstein's theory of General Relativity, they suggest the possibility of faster-than-light travel or travel between different times. However, they remain purely theoretical, with no experimental evidence yet. Scientists are exploring their implications for understanding the universe, but significant challenges exist, such as the stability of wormholes and the exotic matter needed to keep them open.