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Setting Their Own Course

Undersea rovers that autonomously plan their missions

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MAGAZINE HIGHLIGHTS

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Climate and the Khan

A fortuitous shift in weather patterns fueled the Mongol Empire's explosive growth 800 years ago. But will a less favorable change, currently underway, result in catastrophe?
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Geothermal's Carbon Dioxide Boost

Carbon dioxide, the bane of climate change, can serve a positive role to boost geothermal energy output.
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Genetically Engineering Algae for Better Biofuel

Algae promises cheaper biofuels that could power everything from jets to cars.
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