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The biggest threat to mankind. What will end the world as we know ?

Does the world need to be saved ? Are we heading toward an inevitable extinction ? will that be a new generation bomb ? or will it be pollution ? will it be depletion of natural resources ? or will the machines be our killers as it is suggested in many sci-fi stories ?

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    Jun 18 2012: But, I also have a feeling that people around me are just waiting for something big to happen. It's like we're not able to just live in 'peace'. We're all secretly wishing for a WWIII or aliens or zombies or cyborgs or... you name it! ;) And the more I think about it, the more I feel like something BIG will happen... soon! :)
    • Jun 19 2012: Better to go out in something like that then just die in your sleep, right?

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