Ugrunaaluk

What it was like

Ugrunaaluk was a duck-billed plant eater, known from the bones of many young animals. It had a broad beak and rows of grinding teeth.

Many scientists think it is simply Edmontosaurus, and that its bones look different only because they come from young animals.

Its world

It lived about 72 to 66 million years ago, at the end of the Late Cretaceous, in what is now northern Alaska, in the United States. Its bones come from the Prince Creek Formation, far to the north, where it shared the land with the tyrannosaur Nanuqsaurus and the horned Pachyrhinosaurus. It lived through long, dark winters.

How it was found

Mori and colleagues named Ugrunaaluk in 2016. Its name comes from a word in a local native language.