In Search of the Equine Common Ancestor: Horse Series Part III

In our last installment of this series, When is a Horse a Horse? we recognized that the living species of equines (horses, zebras, donkeys etc..) represent groups of genetically divergent individuals that naturally do not interbreed on a regular basis.  Each of these lineages of equines is behaving as a species as defined by the biological species concept.  This raises the […]