Space and Time Travel

Scientists' views on time travel and interstellar space flight.

Guests:

J. Richard Gott
*Professor of astrophysics, Princeton University, Princeton, New Jersey
*Author, Time Travel in Einstein's Universe: The Physical Possibilities of Travel Through Time (Houghton Mifflin, 2001)

William R. Alschuler
*Professor of science, California Institute of the Arts, San Francisco, California
*Author, The Science of UFOs: What If They're Real? (St. Martin's Press, 2001)

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