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P 1 90833734 palm turbinesWind turbines keep getting bigger: One design is three times taller than the Statue of Liberty, with blades that are each as long as a football field. The massive size makes wind energy cheaper to produce. But it also makes it harder to design equipment that can stand up to high winds. Instead of making stronger blades, one team of engineers created blades that can easily bend in a hurricane.

Image: DOE