Summary:

- This article discusses the discovery of a new species of dinosaur called 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 analyzed the fossils of Meraxes gigas and found that it was a close relative of the famous Tyrannosaurus rex, but with some unique features such as a large, bony crest on its head and proportionally smaller forelimbs compared to its body size.

- The discovery of Meraxes gigas provides important insights into the evolution and diversity of large carnivorous dinosaurs in South America during the Late Cretaceous, and helps to expand our understanding of the complex ecosystem that existed at that time.