Also known as the Sunda Island Tiger, this extinct mammal was once considered the smallest tiger species, comparable in size to a mountain lion or leopard.
These massive mammals stood around 7 feet tall and weighed approximately 1,800 pounds. As herbivores, they primarily fed on plants and bushes.
Often referred to as the "American horned dawn-king" Eobasileus roamed North America during the Eocene epoch and had three pairs of horns that adorned its skull.
The name of this extinct mammal is misleading, as it is neither an elk nor originated in Ireland. In fact, it is considered to be the largest deer species that ever existed.
The Pyrenean Ibex, a wild goat species, once inhabited mountainous and cliff-like areas before facing extinction. What’s interesting about these mammals is that they actually went extinct twice.
Quagga looks like a cross between a horse and a zebra – but it's not a zorse! This extinct mammal was known for its distinctive appearance, featuring zebra-like stripes on its head while the rest of its body boasted a reddish-brown color.
Many scientists' favorite creature from the fossil record is indeed the Sabre-Toothed Cat, commonly referred to as the Saber-Toothed Tiger.