Henry Fairfield Osborn, the president of the American Museum of Natural History, officially described and named Tyrannosaurus Rex, based on fossils discovered by Barnum Brown in Montana. T. Rex, whose name means 'tyrant lizard king,' quickly became the most iconic and famous dinosaur in the world. Osborn's description and the subsequent mounting of the skeleton at the AMNH captivated the public and cemented the dinosaur's place in popular culture.

The naming and public display of Tyrannosaurus Rex provided the 20th and 21st centuries with its definitive symbol of prehistoric power and ferocity. T. Rex has become a cultural touchstone, appearing in countless works of literature, film, and poetry as a metaphor for nature's raw, amoral power and the fragility of existence. It has profoundly shaped the poetic imagination of deep time, serving as a potent reminder of the transience of all species, no matter how mighty.