Experts believe the fossil is nearly 70 million years old and likely came from an herbivorous species of dinosaur

The Denver Museum of Nature and Science is filled with exhibits of dinosaur skeletons. And in the scientific equivalent of tossing couch cushions, its scientists discovered a dinosaur fossil deep — really deep — below the surface of one of its own parking lots, the museum announced this week.

We won the dinosaur lottery,” says curator James Hagadorn, who helped ID the 67.5-million-year-old bit of bone.