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
Fund for the Replacement of Animals in Medical Experiments Fund for the Replacement of Animals in Medical Experiments Fund for the Replacement of Animals in Medical Experiments (FRAME) is a charity based in Nottingham, UK. FRAME promotes consideration of the ethical and scientific issues involved in the use of laboratory animals for medical research, and the adoption of the Three Rs strategy of alternatives to animal testing. The Three Rs (Replacement, Reduction, Refinement) strategy was first suggested by zoologist William Russell and microbiologist Rex Burch, with Replacement being the ultimate goal. FRAME campaigns for the replacement of animal testing methods with alternatives that do not use animals. If there