"Rex Regum" is a historical graphic novel written and illustrated by Bernardo Ferná ndez, which presents the story of a small Tyrannosaurus Rex and the dynamics of these large animals from their birth to the Chicxulub impact. A historical graphic novel about the life of the dinosaurs that inhabited the Yucatá n Peninsula. Through the eyes of a small Tyrannosaurus Rex, we see the dynamics of these large animals, from their birth to the moment before the Chicxulub impact, the massive asteroid that struck Yucatá n and changed the natural course of life on Earth's surface, ending the reign of the dinosaurs. Chicxulub not only exterminated the large dinosaur species that dominated the Earth, but climate change was so profound that plants, insects, and various forms of life succumbed. This historical graphic novel is documented by paleontologists from the Desert Museum in Saltillo.