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The human race shouldn't have all its eggs in one basket, or on one planet. Let's hope we can avoid dropping the basket until we have spread the load.

"'New window on universe' excites Stephen Hawking". Interview with Eric Berger, www.chron.com. April 10, 2011.
The human race shouldn't have all its eggs in one basket, or on one planet. Let's hope we can avoid dropping the basket until we have spread the load.