Wormholes are theoretical tunnels through spacetime that could connect distant points in the universe. The idea comes from Einstein's theory of general relativity, which describes gravity as a warping of spacetime. The equations suggest that if spacetime is warped enough, it could create a "bridge" or tunnel connecting two different regions. However, these equations also require the existence of exotic matter with negative mass-energy, which hasn't been observed in our universe. While the concept is fascinating, it's still just a theoretical possibility. Scientists are still trying to understand if wormholes are actually possible, and if so, how they could be created or used for travel.