Buckminster, known more colloquially as Buck, is an English weasel who recently lived in the underground Dinosaur World. A slightly unhinged weasel, Buck had fallen into the world of dinosaurs at a young age and made the most of his time there, staking out a life for himself. Constantly seeking adventure in all its forms, most notably by constantly engaging in battles with the immense albino Baryonyx known as Rudy, one of which had cost Buck his right eye.