By CNN on October 12, 2011
Peter Diamandis, chairman of the X Prize Foundation and inventor Donnie Wilson on Wilson's Oil Cleanup X Challenge win.
View the discussion thread.
Drones are helping in the struggle against poachers: https://t.co/ppEDqbQlvE @NBCNewsMACH
Uncovering the green and forested history of Antarctica: View on Google+
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