International audienceBiocosmology is based on the principle that the laws of the biological microcosm mimic the laws of the macrocosm. A number of observations show that rules governing the complexity of living beings, i.e. the principles of juxtaposition and integration leading to mosaic structures, can be found in several other fields involving complexity: memory, consciousness, language, drawing, music, technical objects, mathematics, social structures, dialectics and ethical stances. The general application of the mosaic model, valid in many areas of the human microcosm, suggests it may be relevant for describing areas of the macrocosm still being explored