Felidae Oligocene, about 25 million years ago, with the appearance of "Proailurus" and "Pseudaelurus". The latter species complex was ancestral to two main lines of felids, the cats in the extant subfamilies and a third major group of extinct cats, which are assigned to the subfamily Machairodontinae. The machairodonts included the saber-toothed cats such as the "Smilodon". The "false sabre toothed cats", the Barbourofelidae and Nimravidae, are not true cats, but are closely related and together with Felidae and other cat-like carnivores (hyaenas, viverrids and mongooses) make up the feliform carnivores. Results of mitochondrial analysis indicates that all the Felidae descended
Kurdistan Institution for Strategic Studies and Scientific Research (KISSR) and Scientific Research (KISSR) was founded in 2005 under the name of Kurdistan Technology and Research Centres with the support of Kurdistan Regional Government and the Ministry of Higher Education and Scientific Research. In the late of 2008, it was re-established under the name of Kurdistan Institution for Strategic Studies and Scientific Research (KISSR). There are currently four active research centers in Kurdistan Institution in variety of fields, which are: In addition, In addition, Kurdistan Institution includes the following directorates and departments: Kurdistan Institution for Strategic Studies and Scientific Research (KISSR) Kurdistan Institution for Strategic Studies and Scientific Research (KISSR)