Professor Martin Rees discusses the modern search for extra-terrestrials, and the theory that our idea of alien life is all wrong: that it's not organic life we should look for out there, but machines.... (Full plot summary below)
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Professor Martin Rees discusses the modern search for extra-terrestrials, and the theory that our idea of alien life is all wrong: that it's not organic life we should look for out there, but machines.
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