Aliens: The Big Think

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, bu... Read allProfessor 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.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.