Summary:

- This article reports the discovery of a new species of dinosaur, Meraxes gigas, which was a large carnivorous theropod that lived in what is now Argentina during the Late Cretaceous period, approximately 90 million years ago.

- The researchers describe Meraxes gigas as a close relative of the iconic Tyrannosaurus rex, but with some unique features, including a disproportionately large head and a specialized nasal region that may have been used for display or communication.

- The discovery of Meraxes gigas provides new insights into the evolution and diversity of large carnivorous dinosaurs in the Southern Hemisphere, and highlights the continued importance of paleontological fieldwork in uncovering the secrets of prehistoric life.