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Why do we refer to it as a "wormhole"? Could you elaborate on the origin of this term and its significance in the realm of theoretical physics? I'm particularly curious about the connection between its name and the concept it represents. Is there a specific reason why it's called a "wormhole" rather than something else? Could you explain the etymology and the scientific rationales behind this terminology? I'm eager to understand the depth and nuance behind this fascinating concept.