Science and technology

Associated Press
In this April 29, 2015 photo, rain clouds form in the sky over a desalination plant in Sydney, Australia. On the world's driest inhabited continent, drought is a part of life, with the struggle to survive in a land short on water a constant thread in the country's history. The U.S. state of California is looking to Australia for advice on surviving its own drought. (AP Photo/Rick Rycroft)

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