The new dinosaur was a long time in coming, and not just because it’s more than 100 million years old. The fossils came from Dinosaur National Monument, a park in Colorado and Utah. But this particular quarry wasn’t discovered until the 1970s and wasn’t excavated until the early 1990s. The skulls were found in 2005. Tantalized researchers, though, were stymied by rocks around the bones that were so hard that workers were unable to break through, even with use of a jackhammers and concrete saws [Los Angeles Times]. Naturally, they turned to explosives. For three days teams detonated explosions to loosen the rock without damaging the fossils.
Image: Brigham Young University