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"NASA’s twin Viking spacecraft may have missed signs of life during their examination of the Martian surface 30 years ago. Researchers now say that the landers’ experiments were not sensitive enough to find life and in any case...
"Genetically modified bacteria can produce a biodiesel from plant materials, researchers have shown. The GM bugs could help cut carbon dioxide emissions while also reducing the need to grow crops to make greener fuels, they say."
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