Portals in space and How to find them

Portals in space and How to find them

Originally published in June 29, 2012: A favorite theme of science fiction is “the portal”–an extraordinary opening in space or time that connects travelers to distant realms.  A good portal is a shortcut, a guide, a door into the unknown. If only they actually existed… It turns out that they do, sort of, and a NASA-funded…

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