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Time travel is possible Today ... Questions raised by physicists, from Newton to Kurt Gödel to Einstein to Stephen Hawking, are among the most profound we can ask. Is time real?

Famed physicist Stephen Hawking took gravity to its ultimate ... which states that time travel into the past is forbidden ...

HR: It is a scary prospect. You're with Talk Asia, our special guest - Professor Stephen Hawking. When we return, more on time travel, alternative universes and UFOs! HR: Welcome back to Talk Asia ...