historyWikipedia1991 · Shell, Wyoming, USA
A dinosaur quarry was found because someone was scouting for wildfires
In 1991 a Swiss commercial fossil team digging near Shell, Wyoming, uncovered an almost complete Allosaurus, later nicknamed Big Al. They were working beside the old Howe Quarry, which sat on private land they had permission to use, but the new dig 300 metres north was on public land. Bureau of Land Management staff flying over to watch for wildfires noticed that a dirt road had been widened without authorisation. On the ground they found the quarry, covered by a tarp, at the end of it. Fossils on public land belong to the public, so the Swiss team gave up the skeleton and was not penalised. The Museum of the Rockies took over the excavation.
Fossils on US public land are treated as public property, which is why the land boundary decided the skeleton's fate. The BLM crew did not know about the dig; the road they spotted from the air led them to it. Once it was confirmed the quarry was on public land, bones were mapped, wrapped in plaster jackets to prevent breakage and moved to the museum.
Big Al is about 95% complete, one of the most complete Allosaurus skeletons known, and it records a hard life: 19 injuries or diseases, many healed, including an infected toe bone that may have caused a limp. A single skeleton showing so much damage gave scientists a rare view of how a predator lived and survived.
Big Al starred in the 2000 BBC documentary The Ballad of Big Al, which imagined the animal's life from its injuries.
Adapted from Wikipedia, the free encyclopedia · CC BY-SA 4.0
Illustrative photo · Tim Evanson from Washington, D.C., United States of America, CC BY-SA 2.0, via Wikimedia Commons
