Scientists from the Denver Museum of Nature and Science have discovered a 65-million-year-old mammal species, part of the group that includes modern hoofed animals like deer, cows, and pigs.

A new species of fallow deer, Dama roberti, described by Adrian Lister and Marzia Breda in 2013. Left: fossil skull and antlers from Pakefield, Suffolk. Right: reconstruction by David Waterhouse.