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Instead, it's a long, lumpy, and it's called an Einstein-Rosen caterpillar, and it's named after the theoretical bridge that connects two regions of space-time, the Einstein-Rosen bridge. And discovery is important in that it's a way of proving that the weird rules of quantum mechanics control the shape of space-time inside a black hole. And researchers started out with a simple model of a perfectly smooth wormhole that maintains an ordered quantum state.