This triptych shows three significant scenes (from a total of 12) from the story of mammal evolution that is told in the book “Beasts Before Us” by Dr. Elsa Panciroli. The first scene is from the Carboniferous and features synapsid Archaeothyris and diapsid Petrolacosaurus. The second scene is from the Early Permian and features pelycosaur synapsids Dimetrodon, Casea, and Edaphosaurus. The last scene is from the Middle Jurassic and features mammal Amphitherium and dinosaur Megalosaurus.