...but it's no simple matter.
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References
Visser, M., Kar, S. & Dadhich, N. Traversable wormholes with arbitrarily small energy condition violations. Physical Review Letters, 90, 201102, (2003).
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Ball, P. Making a wormhole just got easier.... Nature (2003). https://doi.org/10.1038/news030527-12
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DOI: https://doi.org/10.1038/news030527-12