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Is there a difference between Tyranosaurus rex and NanoTyrannous lancensis?If so,what differences and how big are they?
from J, age 16, Atlanta, Georgia, America; July 27, 2001
TOM: Many paleontologists agree that the dinosaur called "Nanotyrannus lancensis" in the 1980s and 1990s is just a young T. rex. If so, then the difference was just age.
Nanotyrannus is known only from a skull, which is proportionately lower and has more and smaller teeth than an adult T. rex. However, young paleontologist Thom Carr has shown that the differences between Nanotyrannus and T. rex are exactly the same differences between young and adult specimens of other tyrannosaur species. Also, the skull of Nanotyrannus has bone texture typical of an immature archosaur.
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