A life reconstruction of a pack of ‘Nanotyrannus’ attacking a juvenile T. rex. — Anthony Hutchings/ The New York Times
FOR 40 years, dinosaur experts have been locked in a huge debate over diminutive fossils found in the western United States. Did they belong to a teenage version of Tyrannosaurus rex or another species in the tyrannosaur family entirely?
A new study may have settled the dispute.
