The Earth is to fragile a basket to hold all of humanity's eggs.

Apologies for the paraphrase and not remembering who said it...just the way my mind works. I remember isolated facts but not where they came from if I'm not consantly using them. (Makes it a real hassle at work sometime to look up something I know to give the reference but can't remember exactly where...)

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"Light thinks it travels faster than anything but it is wrong. No matter how fast light travels it finds the darkness has always got there first, and is waiting for it." — Terry Pratchett, Reaper Man

441!!!! :)