Einstein-Rosen Bridge

An Einstein-Rosen bridge, often called a wormhole, is a theoretical tunnel connecting two separate points in spacetime, based on Einstein's theory of general relativity. Imagine spacetime as a sheet of paper; a wormhole would be like folding the paper so that two distant points touch, allowing for a shortcut between them. While intriguing and often featured in science fiction, wormholes remain speculative and have not been observed in reality. Their stability and practicality for travel also raise complex scientific questions, making them a fascinating but hypothetical concept in modern physics.