Barnum Brown, a prominent American paleontologist, discovered the first partial skeleton of a Tyrannosaurus Rex in Montana. The species was later officially named by Henry Fairfield Osborn in 1905. T. Rex quickly became the most famous and iconic dinosaur, captivating the public imagination as the ultimate predatory dinosaur of the Cretaceous period.

The discovery of Tyrannosaurus Rex provided the 20th and 21st centuries with a powerful and terrifying symbol of prehistoric might and extinction. This beast has featured prominently in poetry and literature, serving as a metaphor for primal power, the destructive forces of nature, and the ultimate failure of even the mightiest creatures to survive. It has profoundly shaped the public's imagination of deep time.