In the icy expanse of Antarctica, a groundbreaking experiment has uncovered astonishing evidence of a parallel ... not just ...

Parallel universes crop up in two places in physical ... which means it should exist. Perhaps time travel into the past is ...

Is it possible according to science? Explore the theories, paradoxes, and real-world concepts behind time travel.

There is a strangeness to the cosmic symphony that may encompass time travel, higher dimensions, quantum superspace, and parallel universes—worlds that resemble our own and perhaps even occupy ...

NOVA: Do you think that backwards time travel will ever be possible ... or do you think it's more likely that that there are parallel universes? Hear Sagan via RealAudio Sagan: It's still somewhat ...

An curved arrow pointing right. CalTech theoretical physicist Sean Carroll stopped by BI to talk about string theory, parallel universes, and other exciting topics he discusses in his new book ...