Most individuals who are interested in dinosaurs, whether it be through following developments in information or simply by watching films such as Jurassic Park, may be familiar with the fact that T-rex (Tyrannosaurus rex) is considered the most terrifying species among other dinosaurs. T-rex is even referred to as the king of dinosaurs. With its extremely large size, many believe that there is no other dinosaur species that can rival it. However, the reality is that there are six dinosaur species that could potentially be worthy opponents for T-rex. So, which dinosaurs are being referred to?

During the Late Cretaceous Period, Alamosaurus coexisted with T-rex. In fossil records, the largest specimen of Alamosaurus sanjuanensis displayed an impressive size, reaching a length of 2,987 cm, a height of 762 cm, and weighing nearly 100,000 pounds. Its long and strong tail served as a whip to attack and trample smaller reptiles.

Patagotitan is one of the giant herbivorous dinosaurs that has enough ferocity to threaten the T-rex. Known as part of the South American sauropod group, Patagotitan makes the T-rex appear small in comparison. This giant dinosaur is sometimes referred to as Titanosaurus, measuring approximately 3,567 to 3,688 cm in length and weighing up to 57 to 85 tons.