The famed Tyrannosaurus rex may have evolved in a very different location from its direct ancestors, new research finds.
The new study builds on earlier research, which suggested that T. rex's ancestors arose in Asia and migrated to North America when sea levels fell, providing a land bridge between the continents. The new study, published Wednesday (May 7) in the journal Royal Society Open Science, provides more evidence that T. rex originated in what is now North America — and this fearsome species' as-yet-undiscovered direct ancestors arose in Asia and migrated across the ancient Earth more than 70 million years ago.
