This means the virus can travel long distances and remain ineffective for up to two weeks traveling on microscopic pieces of dust and debris. (petairapy.com)
In trying to understand how comets, asteroids, and planets were built from microscopic pieces of dust whirling around the protoplanetary disk, modelers have a problem they call the «aggregation barrier.» (sciencemag.org)
16 Although they don't easily biodegrade, some plastics «photodegrade»: Sunlight can break up the molecular bonds in the polymers, turning the material brittle and causing it to break into small, often microscopic pieces. (discovermagazine.com)