Stygimoloch

Stygimoloch is an interesting dinosaur for a number of reasons. Although it lived in the late Cretaceous, it had a number of primitive characteristics. It had five fingers, it had teeth similar to Stegosaurus in the back of its mouth, but the front was filled with sharp incisors similar to a carnivore. All of the remains that had been previously found were misidentified as those from a Pachycephalosaurus. In fact, even Triebold's specimen was initially misidentified as Pachycephalosaurus.

Description and picture by :
http://www.dinosaur-world.com/weird_dinosaurs/stygimoloch_spinifer.htm

The Woolly Mammoth

Description and picture by :

http://en.wikipedia.org/wiki/Woolly_mammoth

The woolly mammoth (Mammuthus primigenius), also called the tundra mammoth, is an extinct species of mammoth. This animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia.

This mammoth species was first recorded in (possibly 150,000 years old) deposits of the second last glaciation in Eurasia. They were derived from steppe mammoths (Mammuthus trogontherii).

It disappeared from most of its range at the end of the Pleistocene (10,000 years ago), with a dwarfed race still living on Wrangel Island until roughly 1700 BCE.