Summary:

- This article reports the discovery of a new species of dinosaur, Meraxes gigas, a giant carnivorous theropod that lived in what is now Argentina during the Late Cretaceous period, around 95 million years ago.

- Meraxes gigas was a massive predator, estimated to have weighed up to 4 tons and measured up to 10 meters long, making it one of the largest carnivorous dinosaurs ever discovered.

- The fossil remains of Meraxes gigas provide insights into the evolution and diversity of giant theropod dinosaurs, as well as the ecosystem and climate conditions in South America during the Late Cretaceous.