Another animal made famous from the movie, Ice Age, the saber-toothed cat is known for its teeth which extended down past its mouth and curved towards its body. It is believed that they pounced on victims, sunk their teeth in, and left it to flop around until it eventually bled to death.
The pyrenean ibex is a wild goat that was last seen in 2000 when a tree fell on it. The female was often mistaken for a deer because its fur was brown throughout the summer, and the males had large thick horns that curved outwards and backwards, and then outwards and downwards. Although it is technically extinct, scientists were able to successfully implant its DNA into a coat. Alas, it was alive!… for seven minutes.