U ovom radu sam pisala o biogeografiji i o novim saznanjima na području evolucije sisavaca. Znanstvenici su dali mnoge odgovore ali je ostalo još dosta bitnih i neriješenih pitanja vezanih za njihovu evoluciju. Podaci dobiveni iz njihovog razvojnog niza možemo koristiti kao model za razvoj filogenetski stabala drugih skupina kao i za evoluciju samog čovjeka.In this article I wrote about the biogeography and new conclusions in the evolution of mammals. Scientists have given many answers, but there remains a lot of important and unresolved issues related to their evolution. informations obtained from their development can be used as a model for the development of phylogenetic tree of other groups, as well as the evolution of people