Scientists unearthed a new dinosaur species in Mongolia, fundamentally altering our understanding of tyrannosaur evolution.
This 86-million-year-old species, named Khankhuuluu mongoliensis, is the closest known ancestor to all tyrannosaurs.
The discovery, published in Nature, reveals a transitional stage from small, agile hunters to the massive T.rex.
Key features, like skull anatomy and powerful jaws, evolved gradually, shaping the tyrannosaur family tree.
