The fossil, estimated to be about 70 million years old, was buried 763 feet below the surface and unearthed because of a drilling project.

The partial vertebra appeared inside a 2.5-inch-diameter column of rock that researchers drilled, earning the title of the oldest and deepest dinosaur fossil found in Denver

A natural history museum in Denver famed for its dinosaur exhibits made a one-in-a-million discovery this week after a prehistoric fossil was found underneath its parking lot. While drilling a 750-foot borehole to assess geothermal heating potential at the Denver Museum of Nature and Science,