Felidae carnivores, meaning they are dependent on nutrients in animal flesh for survival, and because of the large proportion of meat in their diet they are sometimes referred to as hypercarnivores. Of the 13 terrestrial families in the order Carnivora, they are the strictest carnivores. The Felidae comprises two subfamilies, the Pantherinae and the Felinae. The former includes the "Panthera" species tiger, lion, jaguar, leopard, snow leopard, and "Neofelis" species clouded leopard and Sunda clouded leopard. All the non-pantherine cats are part of the Felinae, which includes several genera and the majority of cat species. The first cats emerged during the
William Procter Prize for Scientific Achievement a principal event at the Sigma Xi Annual Meeting, where the recipient delivers the Procter Prize Address. The Prize is named for William Procter, an heir of one of the founders of the Procter and Gamble Company. He was active in Sigma Xi and its affiliated organization, the Research Society of America (RESA), and endowed the award that bears his name in 1950, the year before he died. William Procter Prize for Scientific Achievement The William Procter Prize for Scientific Achievement is an award given by Sigma Xi, a scientific-research honor society. The Procter Prize is presented annually to a