This video-rich Web site makes available a wide array of magnified images captured by microscope. Numerous videos illustrate microscopic processes such as cell division by mitosis, embryonic development, immune response by white blood cells, and zygotes uniting as fertilization takes place. The gallery includes still and video images of white and red blood cells, stem cells, roundworms (C. elegans), mouse embryonic cells, amoebae, protozoa, plankton, fruit flies, sea urchins, leaf cells, and zebrafish. The images and accompanying text explore cellular structure and function.

The site also discusses how studying other organisms--even very tiny ones--helps scientists understand human health and disease.