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5/5 The earth could be habitable for another three billion years. Is there time to escape?
4/5 If the sun and the stars burn themselves out, will any life survive in the darkness?
3/5 Brother Guy Consolmagno thinks ahead to a post-human future and back to ancient beliefs.
2/5 Will the universe implode or will it expand? Brother Guy Consolmagno investigates.
1/5 Brother Guy Consalmagno examines ideas about the future of the universe. Is it immortal?