In science fiction, wormholes are hyperspace subway tubes linking one part of a galaxy directly to another, distant point. But could they actually exist? To find out, we talk to theoretical physicist Ron Gamble, who says wormholes aren't just a matter of science fiction — and they have big implications about the shape of space itself.

Want to hear about more hypotheticals physicists have to confront in their work? Email us at [email protected] — we might turn your idea into a whole episode!

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