The First Dinosaur from Washington State. 2015. PLoS One
The fossil is 16.7 inches long and 8.7 inches wide. Because the fossil is incomplete, paleontologists aren't able to identify the exact theropod family or species it belonged to. However, Sidor and Peecook compared the fossil to other museums' specimens and were able to calculate that the complete femur would have been over 3 feet long -- slightly smaller than T. rex. The fossil is from the Late Cretaceous period and is approximately 80 million years old. PR
