Until very recently, no extensive evidence of dinosaurs had ever been found in the Arctic or Antarctic. The polar regions of the planet where winter means months of cold and darkness. In 1984 that all changed. Dinosaurs were discovered on the North Slope of Alaska. This simple discovery, made almost by accident, would end up changing the way we look at the dinosaurs.
	Dr. William Clemens of the University of California Berkeley prepares a fossil.
	Dr. Howard Hutchison of the University of California, Berkeley discovers the skull of a Pachyrhinosaurus.
	Mark Goodwin, of the University of California Museum of Paleontology, prepares the Pachyrhinosaurus skull found by Dr. Howard Hutchison. This specimen, found 250 miles inside the arctic circle, is one of four known to exist.
	These fossils make up the foot of an adult Hadrosaur. These creatures were 20 to 25 feet long. Hadrosaurs lived in the Cretaceous Period, and were among the last species of dinosaur to exist.
	Skin impressions, molds and casts. Shells, stumps, and other remains, including skin, often lie in sediment until it becomes firm. Through time the dead objects decay or dissolve, leaving a cavity known as a natural mold or impression. Found by Mike Greenwald of UC Berkley.

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