Why did this animal that had prospered so in the Colorado desert leave his amiable homeland for Siberia? There is no answer. We know that when the horse negotiated the land bridge... he found on the other end an opportunity for varied development that is one of the bright aspects of animal history. He wandered into France and became the mighty Percheron, and into Arabia, where he developed into a lovely poem of a horse, and into Africa where he became the brilliant zebra, and into Scotland, where he bred selectively to form the massive Clydesdale. He would also journey into Spain, where his very name would become the designation for gentleman, a caballero, a man of the horse. There he would flourish mightily and serve the armies that would conquer much of the known world.