This dino-mite find, which Hagadorn described as "quite the cherry" on top of the project's intended mission, was discovered 763 feet below the surface and was identified as the "deepest and oldest dinosaur fossil ever found within the city's limits," the museum said in a press release.

This is a scientifically and historically thrilling find for both the Museum and the larger Denver community,” said Dr. James Hagadorn, the curator of geology at the Denver Museum of Nature and Science.