Tyrannosaurus rex became extinct about 65 million years ago. They were the biggest meat-eaters in the world, measuring about 13 meters in length.

The quaggas were zebras with stripes on only the front half of their body. They were hunted for their meat and skin. The last one on earth died in 1983.

The Irish elk went extinct about 11,000years ago. They were the biggest deer in the world, and had huge antlers of up to 3.5 meters wide.

The Cave lions became extinct about 12,000 years ago. They were the largest lions that ever lived. Some of them were smaller than modern lions.