Scientists have created tiny disk-shaped particles that can swim on their own when hit with light, akin to microscopic robots ...

The electron microscope with its great resolving power affords theoretical possibilities of making direct studies of sub-microscopic structures of almost molecular sizes.

The physician is seated in a chair next to a table holding a beaker of urine. A woman stands behind him and two figures hover in the doorway. In the background are shelves of syrup jars and albarelli.

Microscopic examination is used to assess cellularity and the cell types present and to determine whether there are crystals. A polarising filter is required for microscopic examination of crystals.