Fine particles are the most dangerous form of air pollution because their microscopic size allows them to penetrate deep into the lungs and the bloodstream.

These crystals reflect the rays of the sun from below the horizon and their microscopic size gives the bluey-silver shimmer of the clouds.

Despite their microscopic size and simplistic cells, bacteria are some of the hardiest life forms around.

Microscopic size of modules will make the use of electromagnetic actuation and interconnection prohibitive, as well, as the use of on-board power storage.

Much of his work focuses on small things, almost microscopic size at times.