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Old April 3 2014, 04:30 PM   #38
Forbin
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Location: I said out, dammit!
Re: automated ships a good or bad idea?

Can't quite recall the novel I read many years ago. An unknown and unknowable alien race decided to destroy the Earth and sent Von Neumann machines, rather than showing up themselves. The Von Neumann machines self-replicated by using the entire planet for raw material, and Earth eventually tore itself apart from the stress. The aliens never even had to leave home, and we never knew who killed us.
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