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The computers that control large industrial control systems the sewage plants, power stations, and assembly lines that keep civilization running aren’t supposed to be online. Computers online tend to get hacked, of course, and you wouldn’t want your local power plant under rogue control . But a graduate student was able to locate and map more than 10,000 industrial control systems that are directly connected to the Internet, as reported by Kim Zetter at Wired’s Threat Level Blog .

Energy efficiency is not just for appliances and vehicles on Earth--spacecraft that conserve fuel can provide a boost to humanity, too. In a recent article for