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Homotherini (Machairodontini) is a tribe (or subtribe) [1] of saber-toothed cats of the family Felidae (true cats). The tribe is commonly known as scimitar-toothed cats.These saber-toothed cats were endemic to North America, Europe, Asia, Africa, and South America [2] from the Miocene to Pleistocene living from c. 10 Ma until c. 12,000 years ago.
This final subfamily includes the genus Smilodon, known as the saber-toothed cat, which went extinct around 10,000 years ago. The earliest known felid genus is Proailurus , part of Proailurinae, which lived approximately 25 million years ago in Eurasia.
Most cat species have a haploid number of 18 or 19. Central and South American cats have a haploid number of 18, possibly due to the combination of two smaller chromosomes into a larger one. [31] Felidae have type IIx muscle fibers three times more powerful than the muscle fibers of human athletes. [32]
The reason that a number of groups went extinct in North America but lived on in South America (while no examples of the opposite pattern are known) appears to be that the dense rainforest of the Amazon basin and the high peaks of the Andes provided environments that afforded a degree of protection from human predation. [169] [n 25] [n 26]
As of 2024, the domestic cat was the second most popular pet in the United States, with 73.8 million cats owned and around 42.2 million households owning at least one cat. [ 210 ] [ 211 ] In the United Kingdom , 26% of adults have a cat, with an estimated population of 10.9 million pet cats as of 2020.
The reality is that every cat is different, of course, but one lucky cat owner hit the jackpot with her virtually opposite kitty siblings. Merlin and Ivy are both adorable ragdoll cats, but some ...
Domestic cats, dogs, and primates, such as humans, are some of the best-known altricial organisms. [14] For example, newborn domestic cats cannot see, hear, maintain their own body temperature, or gag , and require external stimulation in order to defecate and urinate. [ 15 ]
Felidae (/ ˈ f ɛ l ɪ d iː /) is the family of mammals in the order Carnivora colloquially referred to as cats. A member of this family is also called a felid (/ ˈ f iː l ɪ d /). The 41 extant Felidae species exhibit the greatest diversity in fur patterns of all terrestrial carnivores. Cats have retractile claws, slender muscular bodies ...