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
World Day for Laboratory Animals groups opposed to the use of animals in research. In April 2010 protesters marched through central London calling for an end to the use of animals in research. A similar march took place in Birmingham in 2012. and Nottingham in 2014. World Day and World Week For Animals In Laboratories have also attracted attention from scientific groups defending the use of animals in research. On 22 April 2009 members of UCLA Pro-Test held a rally in support of biomedical research on animals, and to condemn the violence and harassment directed at faculty member Prof. David Jentsch by animal activists. NAVS