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See Inside Scientific American Volume 307, Issue 6

What Is It?: Salt of the Sky

salt grain, microscropic picture of salt



COURTESY OF HOLLIE ROSIER Swansea University

Salt of the sky: Hollie Rosier of Swansea University in Wales studies the tiny grains of salt found in the atmosphere and how they affect jet engines. The salt grain in this image is two millimeters in diameter. “Salt, along with elevated high temperatures and exhaust gases, could potentially accelerate corrosion,” Rosier says of her ongoing research. This microscopic image was taken during one of her experiments and recently won the university's annual Research as Art competition.

This article was originally published with the title "What Is It?."

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