Einstein–Rosen bridges may reflect a two-directional structure of time that preserves information and hints at a pre–Big Bang universe.
Wormholes are commonly portrayed as cosmic passageways that connect distant parts of space or even different moments in time. However, that popular image stems from a misunderstanding of earlier work by physicists Albert Einstein and Nathan Rosen.
In 1935, Einstein and Rosen were not trying to describe interstellar shortcuts. They were examining how particles behave under extreme gravitational conditions when they proposed what they called a “bridge.” This concept describes a mathematical connection between two identical, mirrorlike versions of spacetime.
Its purpose was to preserve consistency between general relativity and emerging ideas in quantum physics, not to create a route for travel. The association between Einstein–Rosen bridges and wormholes developed later, even though it diverged from the original intent.
In our recent research, my colleagues and I revisit this idea and argue that the Einstein–Rosen bridge suggests something much more fundamental than a hypothetical tunnel through space.
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