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.

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