Cats are similar in anatomy to the other felids, with strong, flexible bodies, quick reflexes, sharp retractable claws, and teeth adapted to killing small prey. As crepuscular predators, cats use their acute hearing and ability to see in near darkness to locate prey. Not only can cats hear sounds too faint for human ears, they can also hear sounds higher in frequency than humans can perceive. The usual prey of cats (particularly rodents such as mice) make high frequency noises, so being able to pinpoint these faint high-pitched sounds gave cats' ancestors an evolutionary advantage. Cats also have a much better sense of smell than humans.
Cats have a rapid breeding rate. Under controlled breeding, they can be bred and shown as registered pedigree pets, a hobby known as cat fancy. Failure to control the breeding of pet cats by spaying and neutering and the abandonment of former household pets has resulted in large numbers of feral cats worldwide, with a population of up to 60 million of these animals in the United States alone.
Since cats were cult animals in ancient Egypt, they were commonly believed to have been domesticated there, but there may have been instances of domestication as early as the Neolithic. A genetic study in 2007 revealed that all house cats are descended from as few as five female African Wildcats (Felis silvestris lybica) c. 8000 BCE, in the Middle East. Cats are currently the most popular pet in the world, now found almost everywhere in the world.
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