Fossils of the previously unknown species of dinosaur were discovered in Alaska’s North Slope in 2006. A cousin of the T-Rex, the Nanuqsaurus (polar bear-lizard) was originally thought to be approximately half the size of a T-Rex, but more recent evidence points to the Arctic dino as being in the size range of the Albertosaurus.

The Nanuqsaurus roamed what is now Alaska some 70 million years ago, and new findings have evidence of the species living in what is now Denali National Park.