The saber-tooth tiger, also known as the saber-toothed cat or sabre-toothed lion, was an extinct group of large predatory mammals famous for their elongated, bladelike canine teeth. The most well-known genus is Smilodon, which lived in the Americas during the Pleistocene to early Holocene epoch, roughly from 2.5 million to 8,200 years ago. These predators were not closely related to modern tigers or lions but belonged to a distinct subfamily called Machairodontinae within the cat family (Felidae). Saber-toothed cats were robustly built and muscular, with canines that could reach lengths of seven to eight inches or more, used primarily to take down large prey. Despite their fearsome teeth, they had relatively weaker bites compared to some modern big cats like jaguars. They mainly relied on strength, agility, and ambush hunting tactics. There were several species of saber-toothed cats, with Smilodon fatalis and Smilodon populator among the largest and most powerful, with longer teeth of up to 11 inches in some cases. These cats were apex predators of their time, hunting large herbivores during the Ice Age, and became extinct around 10,000 years ago. They are often depicted as giant cats with massive saber teeth and stout builds, making them one of the most iconic prehistoric predators known from fossil records like the La Brea Tar Pits. In summary, the saber-tooth tiger is a fierce, extinct carnivorous mammal distinguished by its long, saber-shaped canine teeth, robust body, and powerful hunting abilities during the Ice Age, but it was not a direct ancestor of contemporary tigers or lions.