New research aims to reclassify Nanotyrannus as a distinct species, challenging the belief that it was a teenage Tyrannosaurus rex. The study, led by paleontologist Nick Longrich, argues that the anatomical differences and growth patterns support Nanotyrannus as a separate species. However, other experts remain skeptical, emphasizing the similarities between the specimens and adult T. rex. The debate continues, with the need for further evidence to settle the issue.