Ugrunaaluk

oo-GREW-nah-luck, “ancient grazer” (in the local Iñupiaq language)

Ugrunaaluk was one of the big hadrosaurs, or duck-billed dinosaurs. Many bones were found together in rock formed from flood deposits. Scientists think that many juveniles from a herd may have drowned in a rush of melted water from snowy mountains.

Where:

Alaska

How Long:

25 feet

What It Ate:

Low-growing plants

When:

70 million years ago