Age: Cretaceous Age 67.5 - 65 Million years old From: Hell Creek Formation, Harding County, South Dakota Nanotyrannus ("dwarf tyrant") is a potenti...

From: Two Medicine Formation, Teton County, Montana Albertosaurus is a genus of tyrannosaurid theropod dinosaurs that lived in western North Americ...

Allosaurus Fragilis jurassic age : 145-201 Million Years Old, Morrison Formation ColoradoThe first big meat-eating predator discovered in the Morri...

Allosaurus hand and Lower Arm: 155-150 Million Years Old /(Late-Jurassic) Morrison Formation, Montana. The first big meat-eating predator discovere...

This Tyrannosaurus Rex Tibia bone is from the Cretaceous Age. The lower leg bone was found in the Hell Creek Formation in Fort Peck, Montana. This ...