Classification: Reptiles, saurichsia
Body length: 5 m
Body weight: 450 kg
Epoch: Late Cretaceous
Locations: North America
It could be that nanotyrannus is a juvenile tyrannosaurus. Nanotyrannus is the smallest-known tyrannosaurid and was one of the last tyrannosaurids that lived before the Extinction event of the Cretaceous period.
The majority of palaeontologists are convinced that the scull belongs to a juvenile Tyrannosaurus Rex, although there are slight differences between these two species. Nanotyrannus has more teeth and some bones are interconnected, which was not found on a Tyrannosaurus.