Big Al
Allosaurus
Museum of the Rockies, United States
Specimen Details
Discovery Year
1991
Discovery Location
Howe Quarry, Wyoming
Estimated Age
About 150 million years old
Completeness
95%
Length
8 m
Height
2.8 m
Nickname Origin
Named for its remarkably complete and well-preserved condition.
Historical Significance
Big Al became a benchmark specimen for theropod biomechanics and pathology research.
Interesting Facts
Big Al is one of the most complete Allosaurus skeletons ever found, at roughly 95% complete.
The skeleton shows numerous healed injuries, including broken ribs and a damaged toe.
Big Al's preservation allowed scientists to study Allosaurus growth and pathology in detail.
On display at
Museum of the Rockies