Workers at Dinosaur National Monument uncovered a long-necked dinosaur fossil during asphalt removal.

Intro -- Table of Contents -- Preface -- Acknowledgments -- Part I. Fossils Are Where You Find Them -- 1. Fantastic Fossils -- 2. How Are Fossils Formed? -- 3. What Kinds of Rocks Yield Fossils? -- 4.

Fossilized bones and teeth dating to 773,000 years ago are providing a deeper understanding of the emergence of Homo sapiens.

Ranger David Ward, who was there when the find was made, said: "I said 'have you drawn [the markings] on the rock?' because ...