This "baby picture" of the universe, taken by NASA in 2003, was made by capturing microwaves that were released by the Big Bang some 13 billion years ago. (Image courtesy of NASA.gov)
Science facts that sound like science fiction
Physicists like to theorize about all kinds of far out concepts: parallel universes, dark matter, alien civilizations and even time travel.
Guests
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Michio Kaku: Professor of theoretical physics at the City University of New York. Kaku spoke about his book "Parallel Worlds: A Journey Through Creation, Higher Dimensions and the Future of the Cosmos," at the University of Minnesota Bookstore on Mar. 6.
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