We perceive the world we live in with our sense organs. However, perception with our senses represents only a limited part of the cosmos we live in. There is a world eluding the perception of our eyes. It exists hidden away for its cosmos is extremely small. The world of microcosm. This world is full of fascination and surprises. Up to the 1930s a deeper penetration into the microcosm was impossible. Only the invention of a new technology enabled us to render still smaller details of the microcosm visible to the human eye. A magnification of up to a thousandth millimetre has become possible. This film provides a profound insight into the microcosm. Rare pictures of mites, water bears and other creatures, made visible by means of various microscopes make the film an extraordinary experience. In addition, the DVD includes bonus material explaining the functions of the different microscopes with the help of diagrams. Due to the combination of the subjects of microcosm and microscopes, this DVD is perfectly suited for biology classes as well as physics lessons.