"New Mexico Fossil Unlocks Early History of Giant Tyrannosaurus Species"

Scientists have re-evaluated a partial skull found in New Mexico in 1983 and concluded that it represents a new species of Tyrannosaurus, called Tyrannosaurus mcraeensis, predating the famous T. rex. They observed subtle differences from T. rex in the skull, leading to the recognition of a separate species. However, some researchers doubt this conclusion, citing unremarkable differences and problematic dating. The discovery challenges the understanding of Tyrannosaurus origins and suggests that giant species of this group evolved earlier than previously thought.