Sandstorms can sweep up millions of tons of soil and send dust
whirling away for thousands of miles. Although these storms seem
enormously powerful, some of their strength actually derives from the
tiniest of sources: the midair collisions between individual grains of
sand or dust.
Image credit: squeaks2569 via flickr
Sophie Bushwick is a freelance science writer based in New York City. Her work has appeared in numerous print and online outlets.