The dinosaur, named Duonychus tsogtbaatari, measured about 10 feet (3 meters) long, weighed approximately 575 pounds (260 kg) and lived roughly 90 to 95 million years ago during the Cretaceous Peri… ...

“This is a scientifically and historically thrilling find for both the Museum and the larger Denver community,” said Dr. James Hagadorn, the curator of geology at the Denver Museum of Nature ...