This article is part of The D.C. Brief, TIME’s politics newsletter. Sign up here to get stories like this sent to your inbox. About 30 miles west of Grand Junction, Colo., aspiring paleontologists can sidle up next to working professionals and guides from The Museums of Western Colorado. There, they offer half-day, full-day, and multi-day visits to the Mygatt-Moore Quarry, which has been turning out dinosaur bones on the Colorado-Utah border with regularity since the early 1980s.