Evolution and the Fossil Record: A diagram showing the gradual changes in the horse family over time, highlighting size increase and anatomical shifts.
Diagram illustrating the evolution of the horse family, Equidae, showing changes in size and fossil anatomy over time, with images of Mesohippus, Miohippus, Merychippus, Pliohippus, and Equus, and a timeline from 55 million years ago to present.