There are various evidences of evolution. These include Palaentological evidences, Morphological and anatomical evidences, Embryological evidences and Biogeographical evidences. Embryological evidences means the embryonic development in various organisms is similar to that seen in ancestors. This is explained by a biogenetic law: Ontogeny recapitulates Phylogeny. This was given by Ernst Haeckel. This law explains that an organism repeats its history even during embryonic development.