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Harvard physicists say that wormhole travel may be possible. Wormholes are when space folds and thus gives you something like a portal. This can take you very far places in a short amount of time. Wormholes are theories but may exist. One theory is that wormholes are black holes and on the other side is a white hole. Einstein's theory of relativity is that the universe can be stretched and warped. The Einstein Rosen Bridge theory states that as you compress an object in space, it makes space-time change. It would get curved and eventually collapse on itself creating a black hole and maybe a wormhole. There are many other theories and there is a chance that wormholes exist and could be a way of travel.