Although today's commercial aircraft are more than tough enough to withstand being bounced about by air pockets, sometimes passengers aren't: Turbulence in otherwise calm stretches of air is the leading cause of in-flight injuries. Seeing turbulence ahead of time could save airlines millions of dollars a year, by averting in-flight injuries and also by saving fuel wasted in churning through bumpy air. The National Aeronautics and Space Administration (NASA) is testing a sensor device that could do just that.

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