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Astrophysics: Quasars still defy explanation - Nature.com

Arthur C. Clarke posed one explanation for why no extraterrestrial life forms have been in touch in his 1953 novel, Childhood's End. The book describes a Galactic club of advanced civilizations that have a policy not to interfere in cultures at a ...

Submitted in section: Paranormal news 2013: Astrophysics: Quasars still defy explanation - Nature.com