Why does an animal mark its territory ? How does it recognise its sexual partners ? How can it resist to extreme temperatures ? More than the mere study of these behaviours, a question is raised: may one draw conclusions and apply the results to human beings ? This series aims at getting us to know an unfamiliar field of research: ethology. Each episode introduces a researcher. The goal of this documentary is then to create a real range of behaviours in order to understand better what animals can teach human beings.