Parallel universes crop up in two places in physical ... by opening or closing a wormhole. We don't know how the alternate ...

True to form, he discusses arcane aspects of the field—from how you define time to what it might look like inside a wormhole ... that that there are parallel universes? Hear Sagan via RealAudio ...

It happens in the preferred alternate universes. There's going to be ones ... You can't close a wormhole can you? No, I don't know, they do something with gravitons, kind of put a knot in the ...