Dinosaur Family Dance Party
Thanks to an amazing dinosaur track site discovered in Alaska's Denali National Park, scientists now know that duck-billed dinosaurs, also known as hadrosaurs, once roamed in herds under Alaska's midnight sun. [Read the full story.]
Artist's conception of how the trace fossils were formed roughly 70 million years ago.
A medium-sized track from a duck-billed dinosaur that stomped on muddy ground roughly 70 million years ago.
Skin impressions, like the one shown here, helped paleontologists see what the bottom of the dinosaur's feet looked like.
Birds lived at the same time as dinosaurs in the Late Cretaceous Period. Here is a bird track from the same layer as the hadrosaur tracks.
The National Park Service, a study collaborator, used helicopters to ferry hundreds of pounds of equipment and food to the research site.
Researchers document the full extent of the amazing dinosaur track site discovered in Denali National Park.
A high-resolution lidar scan of a hadrosaur footprint from the Denali track site. The footprint is about 1.5 feet (0.5 meters) long.
Anthony Fiorillo, curator of earth sciences at the Perot Museum of Nature and Science in Dallas, cleaning a dinosaur track.
Preserved the find
The tracks were exposed by a landslide, and could be destroyed by another rockfall. Researchers carefully documented the tracks with molds, for further study.
Weather wasn't always sunny in Denali during field work in 2011.