“It was a dog eat dog world after the extinction of the dinosaurs, but one group that thrived were crocodilians,” shared #NatGeoExplorer Tyler Lyson, curator at the Denver Museum of Nature & Science. A new study describes a new crocodilian, Mandrasuchus milleri, from nearly 65.5 million year old rocks in Colorado. Mandrasuchus milleri is about 5 feet (1.5 meters) long, has broadly rounded jaws with low bulbous teeth, and is a relative to modern alligators and caimans. The species was named after Ian Miller, Chief Science and Innovation Officer at the National Geographic Society, who found many of the specimens while a Curator of Paleontology at the Denver Museum of Nature & Science. Illustration by Andrey Atuchin; Photos by Rick Wicker, Denver Museum of Nature & Science