Felidae the Felidae, later turned out to be members of related, but distinct, families: the "false sabretooths" Nimravidae and Barbourofelidae. As a result, sabretooth "cats" seem to belong to four different lineages. The total number of fossil felids known to science is low compared to other carnivoran families, such as dogs and bears. Felidae radiated quite recently and most of the extant species are relatively young. Felidae The biological family Felidae is a lineage of carnivorans colloquially referred to as cats. A member of this family is also called a felid or feline. The term "cat" refers both to felids in
Animals (Scientific Procedures) Act 1986 of regulation is governed by the granting of a "project licence" (PPL) to a suitably qualified senior researcher. The PPL details the scope of the work to be carried out, the likely benefits that may be realised by the work, and the costs involved in terms of the numbers and types of animals to be used, and the harm that might be caused to the animals. Typically a large and detailed document, the PPL precisely defines which techniques may be applied to particular animals and for what purpose. Finally, the 'place' where regulated procedures are carried out is controlled by